I just got done with my latest build (Hardware-wise, anyway). Details of the new parts below...
Windows XP Professional SP3/Vista Ultimate x64 SP1 Dual Boot
INTEL Core 2 Quad Q9300 @ 2.5 GHz
Arctic Cooling Freezer 7 Pro CPU HSF
ASUS P5N72-T Premium
2 X 2048GB G.Skill PC8500 DDR2 1066 Mhz RAM
Windows XP Professional SP3/Vista Ultimate x64 SP1 Dual Boot
INTEL Core 2 Quad Q9300 @ 2.5 GHz
Arctic Cooling Freezer 7 Pro CPU HSF
ASUS P5N72-T Premium
2 X 2048GB G.Skill PC8500 DDR2 1066 Mhz RAM