Here is one more vote from an old timer, using Vista x-64 since it came out, and with absolutely no problem. (exept i can get rid of damn Windows Media player 11. I WANT 10 BACK!!!!)
anyways, I also agree with Gillos. It's not that the OCZ psu is bad, it's just that with stuff that is coming out, if you're going to buy a power supply, why not buy one "already" equipped with the 4 pin mobo connector aswell as the 6 and 8 pin connectors for the GPUs? ALso, I think it was Chozart (remember, guy with the big noze?) who reported that the OCZ 600 has very small fluctuations at high output.
Flea46: if you'd like you can buy the ATX 650W off ebay for Â£20 inc P&P however you can get good ones from SCAN too. and then buy the 6pin connector for the 8800GTS's which would be cheaper than buying a 750w PSU. however with the system that you eventually choose you may find yourself with not enough power to power it. Do the maths as to what wattage it comes too. I know from experience that atm anything over 650W power supplys do cost alot more to buy initially aswell as the continual running cost.