OK, I did it for my best friend. We bought the 2500+ barton 333FSB. We upped the voltage to 1.7 i think just to make the OC a bit more stable, but it didn't seem like it needed it. Just a precaution really. It's running solid at a 3200+. it's a little warm, but not too bad. If you get an awesome cooler it'll be no problem, but it seems as though the bartons run a bit warm. We got his running at 50c
Anyways, it's been stable now for over two months, so it would be something i'd recommend.