You're on your way! The only thing I'd question is the choice of RAM (DDR2 800) when the CPU is designed to run at DDR3 1333, and the X48 mobo supports it...but if you intend to overclock the memory, the Corsair is one of the better...
But my current choice for mobo is the same as you selected.
-------------------- N11GPS Fastar
TOA-130S
MK66 Std
Vintage C5
Megrez II 80mm ED Triplet APO
SolarMax 40
NJP Temma II
Sirius EQ-G
ST8XE/CFW-8(LRGBHa)/AO-7/DF-2/STV Dlx/ST237a/350D (Unmodded)/Mallincam Color Hyper Plus/DSI III Color/DSI II Pro
Two not-spoiled Golden Retrievers - Maggie and Casey
Sometimes I think we're alone in the universe, and sometimes I think we're not. In either case the idea is quite staggering. - Arthur C. Clarke