Disabling vsync for testing purposes is fine. Be sure to re-enable it after testing and do not play the game with that disabled.
When testing my home computer it never gets below 180FPS, with everything enabled. It typically runs around 290 to 340FPS when playing online. Going fresh into an arena it is instantly above 200FPS. I consider my hardware to be somewhat average for a system today. Windows XP, Intel E8400, 2GB of system RAM, ATI 4850 video card with 512MB of RAM, Audigy 2 ZS sound card, and so on.
Overall, it is just a lean, clean, system.