Help with new system

[offive]

I run 5 instances easily on an old AMD Phenom 1 (4 core) with 8 gig of DDR2. 280GTX for main screen and an older 8800GTX for secondary screen. I don't bother with affintity and both screens are 24" with native resolution of 1900x1200. Slaves run at 15fps when not active. I recently upgraded to an Intel SSD drive and Win7 64bit.

Your i7 920 should be fine given enough ram. If possible I would save your moola for the i9s next year. I know I always hate investing a large sum only to find out 6 months later that the new and imrpoved model is that much faster! Of course when the i9s hit they will uber expensive, but should future proof you for quite some time.