Aha, you guys are making me feel excessively out dated. Still using an athlon 2 x3, anyhow along with everyone in this thread I would have to say grab the i5, if you want to do it in parts you could grab an AM3+ mobo, keep your current cpu, then once you have enough upgrade to an 8320 FX
^This doesn't seem like a bad idea. What do you guys think? http://www.anandtech.com/bench/Product/288?vs=698
I know everyone says go intel for gaming, but I think it holds it's own.