$200 I7 920 Intel boxed processor & heatsink

[pjlent]

Micro Center has had a sale on these for a while now. Although you need to go to their store (they won't ship), and there's added state sales tax, this is the best deal around for this VERY overclockable uP. Just get a decent MB and different "decent" heatsink, and you can OC it to upwards of 4GHZ (for about $700 less than an I7 975 running at 3.2GHZ)