what resolution are you planning to play at? Are you going to be playing Crysis with AA + AF? How long are you going to keep the PC for?
If you are going to be playing anywhere near the HD resolution with 35+ FPS you are probably looking at spending $1400+ just for the rig itself.
http://www.guru3d.com/article/sapphi...aporx-review/8
http://www.guru3d.com/article/sapphi...porx-review/13