Well I don't have a LCD, but like you I'm also shopping for one, this is what I find in my search...
1) DVI input are only avaliable on LCD's 17" or higher, this isn't much a problem excpet price, but....
2) 17"+ LCDs all have native resolutions of 1280x1024, which means you need to have one mean machine to run games at that res. If you go lower like 1024X784, the screen gets grainy, I've seen this on my friend's 17" LCD. It looks sharp at native, but not lower.
IMO, if you're not pushing for space saving conerns, a CRT is still a better choice for gaming.