As far as the power supply goes, i had a Coolmaster one for almost 5 years, and it hasnt had any problems yet. Just wondering, why do you need 2 6 pins and 2 8 pins? Are you Sli-ing something? I really think thats over kill, again, unless ur Sli-ing some cards togeather, for I use 750 watt for my 9800gtx. I would go for 750 watt and 1 6 pin spot. Thou, does the liquad cooling run off the power supply?
P.S. Congrats on ur gift