I recomend as with anyone who asks about PSU's is the thermaltake dual fan series of psu's, they have high wattages and a reliable. I would recomend a 480watt Active PFC version because you can adjust the speed through a controller packed with it. It also does a great job of keeping the PSU and System cool! The one you stated above is the exact one im talking about.
Core 2 Duo E6400, DFI Infinity 975X/G, 2x 512mb DDR2 667mhz, Albatron 7900gt, WD 200gb SATA, Samsung DVD-RW, Silverstone ST-50EF 500w PSU.