Just back from hols and catching up. I see you have narrowed down some choices. I too own a 27" Dell Super sharp monitor which I purchased 2nd hand and use it solely for photo editing. I love it and don't see any need to upgrade it. I have no experience of the Asus Pro Art but hear good things about it. I doubt you could wrong with either. It comes down to personal choice and budget restraints. I do think however that 27" is the sweet spot for photo editing.

The Geekom Air 12 150 is another excellent choice for many of the reasons I mentioned in a previous post. I've been using mine whilst on holiday (the purpose for which I purchased it) and I'm delighted with it. I've not used it for photo editing but I do intend to load Lightroom or Darktable (Darktable is free and excellent) on to it for testing. If I have one gripe it's not about the PC itself but rather Windows 11 which has far too much in built telemetry. I would recommend using O&O Shutup to control it or Chris Titus's Windows Utility Toolkit, a sort of windows Swiss Army Knife which I highly recommend.

If you do go with the Geekom Air, your upgrade path is limited. It ships with 16gb of ram which I believe is the max it will take but it is DDR5 albeit single channel but still much faster than the DDR3 or DDR4 which you will currently have on your laptop. Yes 32 or 64 gig might be more desirable but 16 gig should be just fine. I doubt that many if any of us here are what you would describe as power users or heavy duty video editors. (Sorry if any of you are) As for storage, the Geekom comes with a 512gb M2 SSD which can be upgraded to 2tb. I would recommend a Samsung 1tb 990 pro, very fast, highly rated and affordable. Scan usually have some good deals. I would shy away from storing my precious photo's on the PC especially if you are going to use it online. Store your files off-line for safety. I'm sure I recall that some poor soul on this site lost a lot of images to a ransom ware scam. A 3.5" NAZ class hard drive or drives in a NAZ or DAZ configuration, or separate caddy or multiple caddy's is the way to go (IMHO) and restrict these to your local network only.
If you want a more flexible upgrade path then you need to look at something else which will entail more outlay. If constrained by budget the Geekom I believe is an excellent choice and should be head and shoulders above your old laptop. So much to think about... lol... Good luck.

As I've stated previously, do your home work and be sure of your choice before hitting the buy button.

I lost mine for the exact same lens when visiting Fountains Abbey, Got a replacement from SRS, Wasn't cheap as I recall.

Sandisk seem to be the preferred choice for many photographers and are considered to be very reliable. Choosing the best for your needs can be a minefield with so many different and confusing symbols. There is some good information to be found on Youtube but be careful to sift the facts from the opinions. I'll leave two links below which might prove useful to you but apologise in advance if these are too basic for you.
There is also lots of useful information to be found on Pentax forums: link Further searches there will reveal a great deal more.
Good luck....

link

link

In spite of having amassed an enormous collection of lenses old and new I always have that nagging feeling of just needing ONE more lens. Because of you Mr Riley, I now realise that I need TWO more lenses as I don't have either of the above. You are a bad influence!

On a more positive note, I have to say that your equipment reviews are top notch. Doing these must consume an incredible amount of your time for which I don't think you receive the recognition you deserve so here is my public thank you.

Yep, good luck to you G.G. Take your time and do plenty of research before committing yourself. There are some great mini PC,s on the market at the moment and they are generally very affordable. Some even have an oculink port which allows the connection of an external graphics card which whilst arguably helpful with Photoshop it will increase the costs. Furthermore, as I said in a previous post, don't skimp on your choice of monitor. I think someone mentioned the Dell Super Sharp which I would agree is a fine choice and good used ones can be picked up at reasonable prices.

I'm on holiday at the moment in Norfolk and typing this message on on my new Geekom Mini Air PC with which I'm very pleased so far. I have it connected to a large Sony Bravia TV which it runs without a hitch but for close up work, a 27inch monitor should be ample.

Asking for help may sometimes opens a can-of-worms but if you don't ask, you don't get. More info means more informed choice which is generally a good thing providing you can sift the seed from the chaff. I'm sure we all mean well even if it creates a system overload.
Good luck georidegraham....

I agree with your views on laptops David and though there are many who will swear by them, personally I detest using them. In my last post above I suggested looking at a mini PC (The Minisforum UN100P) as an affordable alternative option. As I looked again at this option in more detail it led me down the proverbial rabbit hole whereupon I came across the: GEEKOM Air12 Mini PC 12th Gen Intel® Processor N150.
The spec on this I believe is excellent for what it is, a tiny PC: "GEEKOM Mini PC [Redefining Compact Performance] This GEEKOM Mini PC is equipped with a 12th Gen Alder Lake-N150 processor (4C/4T, up to 3.6GHz), measuring just 4.6 x 4.4 x 1.34 inches with a volume of only 0.5 liters. It outperforms the N100/N5095/N5100/N5105/N95 with 30% faster and smoother performance, delivering a more responsive experience. With a cTDP of just 6W, it’s ideal for web browsing, office tasks, and media streaming, surpassing standard desktop computers in both space efficiency and energy savings. (Note：Ultra-powerful performance in a pocket-sized design with whisper-quiet operation - the premier choice for both enterprise and personal bulk purchases)
【DDR5 Memory + High-Speed Storage】Upgradeable Performance] 16GB DDR5 RAM and a 512GB NVMe SSD, ready for upgrades—the GEEKOM Mini Air12 Mini Computer features 16GB DDR5 memory, offering 50% faster performance than DDR4 models. The 512GB NVMe SSD (expandable up to 2TB) delivers 1700MB/s read speeds, effortlessly handling Windows 11 Pro multitasking and serving as a perfect replacement for traditional desktop computers."
I was so impressed by this that as it was on offer for less than £170 including postage, I ordered one there and then in the early hours Thursday morning and it was delivered the following day. I didn't purchase it for for photo editing, a task I'm sure it is more than adequately capable of but when I go on my travels and holiday, as I don't/won't own or use a smart phone, I take a small laptop for keeping in touch and up to date etc. This is a superb alternative portable travel option at a fraction of the size and weight of the laptop and far and away more powerful. It even sports a card reader for reviewing my photo's and packs quite easily into the laptop bag along with a small wireless/bluetooth keyboard and mouse. As for a screen, well all accommodation these days usually provides a TV which will double as a screen.

So again, for anyone on a budget I really do believe a min PC is worth considering for its portability, small footprint and power to cost ratio.

Sorry for the long winded post.

Looks like someone stole it

And it was not me. I struggle to photograph things in the light so forget the night....

I agree, a new PC would be the way to go. If you are on a budget, maybe you could take a look at this:- The Minisforum UN100P. £155..0 after a thirty quid discount which is good until about 8.00pm tonight. No, it's not exactly high end riveting performance but it should run photoshop better than your old lappy and it supports up to three monitors.

Worth a look out of curiosity if nothing else.... link

My two cents...

I've noticed over the years how some people invest a lot of money on a high end PC only then to skimp on their choice of monitor. One can argue that of all the computer equipment one uses, the monitor is of top most importance. Why? Cos it's the monitor one stares at most of the time to the exclusion of all the other bits of PC equipment. Therefore, to ensure you are getting the best experience, with the minimum of eyestrain, invest in the best monitor you can afford and that doesn't necessarily mean the largest, though larger might be better Your eyes will thank you for it and you will enjoy your photo editing so much more.

Be patient, spend some time on research and looking at reviews before committing yourself to a purchase.

As I said, just my wo cents.... lol... Good luck.