i5 / i7 Question

[r0k0]

I'm in need to get rid of one of my 2 PC's

so question is.. should i put my 2nd rig for sale

Core i5 2500 @ 4.2Ghz Turbo Mode on
Asus P8P67-M Pro B3
2x 4GB Corsair XMS3 DDR3-1600
eVGA GTX 560 1GB
Pionner DVD-RW
Ultra LSX 650W 80+ Bronze
NZXT Gamma with NZXT Sleeved White LED Kit
BenQ G2222HDL 21.5" LED Screen

No HDD

or Keep the i5 for my main rig

and Sell the Above with my
Intel Core i7 960 @ 4.0Ghz
Sapphire Pure Black X58

which would benefit the most of high performance gaming ?

3d mark 06 the i5 wins but
3d mark 11 the i7 wins but the 5970 i guess helps alot right ?

[enaberif]

i7 960 should be 1366 which is a better platform