You ever consider getting a 165 Opty Jakg? You'd prob be able to get ~close to the same OC as your 3700 if you get a good stepping, plus there so cheap now.
I'm prob gonna do a C2D build if/when the price drops really do materialize. Hopefully a nice 3Ghz E63/6400 + the usual goodies. (My 4800 stepping isn't particularly good, and my ram doesn't OC too well)