I7 in general has higher minimum fps, which makes some games better playable, though the extra cost you pay for that premium is not really worth it. Liek stated before, get an 9550 or 9650, OC it to 3.8-4Ghz and you will have enough CPU power for any game out there... Maybe you can sell that GTX 275 and grab 2 ATI 4890 cards to power that 28 inch monitor...