Can i suggest you something ???, first of all, i would recommend you get a better dualcore processor like i,e 6500, 5700,5400+Vt, i am using Dualcore 5700 3.0 ghz 2 mb cache and 800 fsb 45 nm technology, which i have overclocked to 3.7 ghz, and believes me it totally beats the core2duo e8400, so the bottom line is get a dualcore processor like e6500 and e5700 which will be normally available at pg at the price of 4.k to 5.k max, and your all gaming stuff will be entertained with this processor, because if you go on the Core2duo e8400 or quadcores like q8200, 9xx series, they will cost you so much, and there is no such difference about them, so go for Dualcore with low budget prices, and good performance for gaming stuff, i am now playing all the heavy games on my processor e5700 dualcore, with max resolutions and high settings, fps are 40's to 60's depends on game,
So the conclusion is Go for Dual core processor brother.!!!