Probably 4-8 GB of RAM. With a setup like that, you'd probably want 8. 1600 MHz is the best price/performance, I think. I'd suggest a 2500K, as the 2600 won't overclock, and has very little improvement in games – but if you do want HT, then get the 2600K. The Cooler Master Hyper 212+ is pretty cheap while being very good, for what I've read. Get the cheapest DVD burner available, unless you are planning on using it a lot.