I doubt you get much for the K10D... I at least will keep it if i get another camera because the K10D is the last camera with a CCD sensor you never know where it's good for
Also it's always handy to have a spare.

Here are is a review about the eye one and the spyder3
http://www.northlight-images.co.uk/reviews/eye-one_display_2.html

http://www.northlight-images.co.uk/reviews/profiling/spyder3elite-v4.html

I've a spyder3 myself and it works fine for me, would love to compare my screen though with others now ^^;

It's there since the begining I believe.
But for example class 10 is a late edition so some cards that are very fast and can be rated Class 10 might be rated Class 6, the older Extreme III is such an example.

If ur curious about the ASUS display, the NEC 241 has the same screen (LG 10bit IPS) but has a 14lut hardware in it, just look at the price of that one....

About the calibration... if you also have a printer you might want to look at the X-rite colourmunki it can calibrate the screen and the printer.
http://www.northlight-images.co.uk/reviews/profiling/colormunki.html

There are more good reviews about colour management on that site.

Thanks... my eyes aren't what they used to be

What does CSC stand for?
I'm trying my bst but can't figure it out...

Yes it has something to do with the fan so i thought it was about the temperature.

BTW it doesn't seem so bad as it was portrait...
http://blog.macsales.com/10206-further-explained-apples-imac-2011-model-hard-dri...

Ultra is probably already fast enough, it's the processor that's the slowest factor most of the time.
The Extreme cards aren't that much more expensive so i would get one of those to be on the safe side, there are two versions of those the class 6 and Class 10 but the class 6 should do the trick, the class 10 will surely max out the SD reader in the camera.
The Pro is rated as UHS-I (Ultra High Speed 1) and not even the K5 can reach those speeds but they will work in your camera though so for now they are too fast but who knows what the future might bring.

IPS is always good.
What you might want to look at as well is that you get a matt screen and how good you can set the settings of the monitor.

The ASUS one looks good and it has a 12bit LUT (Look Up Table) as well but the panel is 10bit so colour wise should be good.

You can also look at what HP as to offer, these for example.
http://www.tftcentral.co.uk/reviews/hp_zr24w.htm

http://www.tftcentral.co.uk/reviews/hp_lp2475w.htm

http://www.tftcentral.co.uk/reviews/hp_lp2275w.htm

All the software does is read the data so it doesn't alter anything on the card so it's pretty safe