ghosting is rarely noticeable and it depends a lot on the level. [...] Also note that the 204b is a 20" monitor so it's pixel pitch is much smaller 0.255mm vs 0.27mm (for a 21" or 24" dell). I much prefer 0.27mm.
Input lag, not response time. I've heard these days the ghosting on LCDs is pretty much unnoticible.
I would like the pixel pitch to be as high as possible since I can't have the monitor terribly close (maybe three feet, 90cm, at the closest) but that also means higher costs.
NOTE: running 3 monitors also requires a special video card set up such as NVidia SLI or ATI Crossfire.
This bit I looked at since I thought about running three 22" monitors. While crossfire works now, with SLI turned on you can only have one monitor.
Although that's probably knocked on the head the idea of running three 1600x1200 monitors, I don't think I could afford a crossfire setup to run that many pixels (as 1920x1200 is still considered high resolution for gaming).
I'm no expert (anymore) but I think the iMac makes a great PC. =-D It's not run much but OS-X since it was pulled out of the box, and I've since deleted and reclaimed the 20GB I gave to boot camp when I first installed it, but it seemed to run great the couple of times I had to go there.
I have tried one and I think it'd make a fair PC for normal use if you could live with the poor ergonomics. Unfortunately it makes a poor gaming PC which is what I'm after - for the same price as a fully specced up iMac I could get a quad-core with 8gb of memory, dual 8800GTS cards, a blu-ray drive and and x-fi sound card.