Kit Bag which one?

Thanks guys... its looking like I might go for a backpack.... will check out the fastpack now though.

Theres a good informative video demonstration on the Lowepro website.

Just reading now, late as usual

I have both the Lowepro Orion Trekker and the Mini Trekker AW

The Orion is nice and light, I can get the K20D with grip and 2 extra lenses in it. However, in pouring rain it is not good, on a recent photo shoot in monsoon conditions everything got wet.

The mini trekker however, is excellent, It will take, and I quote, K20D+grip, Sigma 24-70 F2.8, DA*50-135 FA 50 F1.4, Sigma 10-20, K10D, DA 16-45, Sigma 70-300 F4-5.6, and at a pinch,my tokina 20-35mm

many thanks for all your advice.

Took the Kata as it was the 'best fit' for airline carry on requirements, not as deep as there is no laptop section.

Another advantage of the Kata is that you can store both straps inside the bag of the back to prevent having straps getting in the way on the plane, and it also has a strap to secure it to your suitcase handle. Well thought out features those, came in handy.

Well I got a Lowepro Fastpack 250 from http://www.morrisphoto.co.uk/ Ordered on Wednesday, arrived first thing on Thursday, great service, goodprice too. The bag itself is very comfortable, has loads of space (for my kit anyway) and the side entry (slingshot style) is very useful. All in all good bag from a good supplier.

Tamrac Expedition 7X and Lowepro Fastpack 350 are my preferred bags. I tried a Lowepro Sligshot 200AW but the weight on one shoulder is too much for me, even lightly loaded.

I've been using the Lowepro Slingshot 200 for quite a while - excellent.
Just got a Lowepro Nova 3 - incredibly small, but I can pack in a whole pile of lenses and kit (K20D+grip+DA17-70, AF360, DA12-24, FA50/1.4, FA80-320 and assorted bits) It's very discrete and comfortable to use! Definitely recommended.
Matt