I use a BenQ G2400GW 24 inch (1920x1200 native)... and I have no problems with it.
Don't see how you could have a problem with it, it's a great size in my opinion for gaming, and competitive gaming alike, I've warred with it in source and played other games competitively with it and had no problems from a competitive stand point, and casually its quiet obviously nicer cause its bigger and looks nicer with a bigger res :P if anything it's probably better once you get used to to is as I think high res gives much more clarity when it comes to quickly spotting people in the distance :P
In conclusion; I used to play on a 19 inch CRT and I have to say going from that to this is a massive advantage haha.
this has turned into an e-penis thread