Re: processor delima
Game-wise, probably a single core CPU. There have been issues with gaming using dual core setups. The dual core can still do a pretty good job gaming despite that. There are kinks to work out with dual core. You will also need to download a Microsoft patch when using dual core to optimize it's performance too. A lot of hassle, but excellent at multitasking.
*Fact: Microsoft Window's Blue Screen of Death vs Computerforums.org's White Screen of Death. Which is worse?