I'm looking to upgrade my PC and I'm wondering which processor would be the best value in a gaming PC. I'm willing to spend about $400 on CPU, ram, and mobo. I have a stick of 512 mb PC 3200 if that figures into the equation at all. I'd be willing to mildly overclock either chip with the stock heatsink fan as well. I'm finding it hard to find benchmarks to compare these processors, so if anyone can help me in determining which route to go for the best value would be appreciated.