It is confusing how many people recommend different power supplies. When replacing my TTGI 320 I had to go through an Enermax EG425, True480, and True550 before finally returning them all and settling on the OCZ Powerstream 520. I am finally happy. I was ready to buy a PCP&C except the noise is a problem for me. the OCZ is quiet, and ROCK solid.
The only thing I DON'T like about it is the lack of the fan on the bottom in favor of the rear fan. This is better for the PSU since it doesn't suck up hot air and reduce max output capability, but if you are air cooling your temps will rise quite noticably.
FWIW I loved the TTGI 320 watt, it was just too small once I got the Prescott and starting OC'ing (actually, It wasn't too bad - no restarts until 3.8GHz).
My other PC has an older Enermax EG365FP and THAT is an awesome power supply. Rock solid, and runs my 3.4 Northy, Radeon 9800 pro, 2 HD, 2 optical, bus powered card reader, 2 blue CC lights, and 6 fans (not including power supply fans) without losing rail stability. I think Enermax, like Antec, used to have better products. I know the EG701 is highly regarded though.
I did not like the Antecs. they seemed to me the least of the lot, and the rails (even on the 550) were way weak under load. FWIW, the True550 has 30A on 12v (not 24A, that was the old one). i think the Antecs perform poorly when hot...and mine seemed to be quite hot most of the time.
Everyone here seems to like Fortron too, but the low price may have something to do with it. For style, power, reliability, and warranty I'd go OCZ again in a heartbeat. I think the only better choise is probably the PCP&C. I chose the 520 over the 600 because I think it is better to have the 12v amps availble wherever you need it, rather than limiting available amps by splitting the rails.
Shane
