BTW I know you won't overlock. But the E8400 OWNS at OCing.
I would not be overclocking my rig. I just need a decent rig which would run my pc games with minimum upgrades for the next 1-2 years.
That's why I am planning for :
Processor - E8400
CPU cooling - CM Sphere (RR-CCZ-LL12-GP)
M/b - Asus P5Q Pro
Graphic card - 8800GT
RAM - 2-4 GB (800MHz - DDR2)
SMPS - Cooler Master 650W (already bought) - Good power!
Cabinet - (already bought) Zebronics (Bijli - 1* 120 MM forward fan, 2*80MM side fans) - I have space for one more 120 MM fan in the back, I think I would be fixing that too just to be sure.
I think this should suffice, but then again there is always room for improvement and new ideas!
So do suggest changes/ improvements.