Any sirtec built coolmax/OCZ are not that good. They have barely in spec ripple and okish voltage regulation. Go for the BP550. It's a delta.

Delta is my 1st choice in power supplies
Biostar Tpower N750 (all UCC solid caps) 5000+ dual core PNY 9800gt 4gb OZC DDR2-800 320gb WDC 700W Delta DPS-700