I totally agree. I've played them all...UT3, TF2, UT 2004, Q3A, etc. This game beats them all IMO. The graphics are amazing in a properly textured and lit map...rivaling newer games. The weapons are unique...I can't wait for more in the future. One of the best aspects, as someone else mentioned, is the movement. It's fluid, fast and precise. All other FPS games feel slow now, and the input feels numb. Nexuiz is very reactive and sharp. I love it. I've always had things I didn't like about every Arena shooter. Nexuiz...I have no complaints. I can't see myself ever playing anything else for my Arena needs.
Oh one other thing...this game's code is VERY efficient. I have a Core2Duo E4300 (one of the lower and Core2Duo CPU's), 2 gigs RAM and only a GeForce 7600GT. In 1280x1024 with effects set to the high setting, I typically get over 200FPS. Amazing considering the fact that other games with similar graphic quality have only run at a max of 60-70 FPS on this machine.