Thanks for all the advice guys... Just so you know trotter my specs are:
Dell Studio MT
Intel 2 Quad Processor Q8200
2.33GHz, 6GB DDR2 SDRAM, 750 GB Hard Drive
ATI RADEON 3450 (256 MB)
I am perfectly fine playing the older FPS games. I paid $899 for this set up along with a 22" monitor. I think that is a reasonably good deal.
See, told ya'll it'd have some beefy processor