I'm in the same exact boat right now. I'm not much of a gamer anymore where a 1ms discrepancy can make the difference between losing or winning a nice prize at a LAN party. The only FPS I'm looking forward to is BF3 and that's no near as fast paced as competitive CSS/CoD2. I'm more looking forward to playing Diablo 3, any new WoW expansion, ES5 etc. Games that I would prefer to look pretty than play smooth. Games that don't need the responsiveness a competitive FPS player would need.
I'm going to check out the BenQ XL2410T tomorrow to see if 120Hz is really all it's cracked up to me. If not, the Dell U2412M it is. Reading PCM's article right now, love his website.
Bf3 is a competitive fps game.
called teamwork.