The most important thing you need to consider is your video card. For one, how much amperage from the 12+v rail does it require and what is the minimum requirements of wattage you need for that video card. By looking at your specs you could go with a 650 watt. Make sure it's 80+ certified. Anything Corsair is great, i'm personnaly using the Corsair TX 750 watt - have been for about 3 years now(and it's still running strong) and i'm running a GTX 460 sli setup along with an i7 920. happy PSU hunting, cheers!