RedMonarch :
Well i was checking out the specs of the i5 750 and the i7 920 and i dont see that much of a difference between them. I mean i was looking at the specs on wikipedia (im not sure if the information there is to be trusted), but i dont know if its worth spending 100 bucks more on a i7 when the i5 is almost the same. If im wrong or theres information i dont know, fell free to add anything so i can understand better, thanks!
i7 920 vs i5 750
socket 1366 vs 1156
triple channel DDR3 vs dual channel DDR3
2.9 max turbo boost vs 3.2GHz max turbo boost
130w TDP vs 95w TDP
hyper threading vs no hyper threading
i7 930s are out for the same price as the i7 920, the 930 is at 2.8GHz stock clock vs the 920 which is at 2.66GHz
For general use/gaming, the i5 works fine. If you're willing to pay more or if you encode, hyper threading and DDR3 will make it faster.