As someone else mentioned, you should check out Soldier of Fortune 2. I never really got into CS, but most SoF2 players say its like CS circa 2002. Great fun...I started with the MP test in April and it sucked away about 4 months of my life when full retail came out. Lotsa weapons and maps, with the flexibility of choosing primary weapons, secondary weapons, pistols, equipment and different grenade types. Its more reality-based than UT2k3 and even RTCW, with the game physics resembling reality rather than pure fantasy. Much smoother engine than RTCW, and the character models and impact prediction are much more reliable than RTCW as well.
I guess I just kinda got burned out from it though after logging over 4k frags and placing first on Quakesh1t for the month of August
I'm tempted to fire it back up though with my ti4200 turbo and the second patch with the SIG assault rifle.....
AA is nice looking, but its a bit too realistic. Its just not as polished as it could be and there is NO gore whatsoever. If you are into fast-paced FPS that are somewhat realistic, I'd stay away from UT2k3. I found the demo to be a total snoozer with weapons that just spam damage all over. No finesse involved.
Chiz