Try to replace PSU with thing like that
NCIX.com - Buy Silverstone Strider ST50F 500W ATX12V 24PIN Power Supply W/120MM Fan Active PFC - SST-ST50F In Canada. NCIX.com - Buy Corsair VX450 450W ATX 12V 33A 24PIN ATX Power Supply Active PFC 120MM Fan - CMPSU-450VX In Canada.
The corsair even with 50V under will outclass the OCZ with no problem.
They have a much more better life time.
The only other thing I would change is the case, going with the CM690 for more expansion slot and fan place. But that's only my preference.
The rest of the build is solid ;)
Ask for more.