I'd recommend the Corsair 400W, Corsair 450w and the Corsair 650w.... The systems i have built them with have withstood mild to heavy overclocks for well over a year now, and the stability is amazing. But its a shame i cant find many of these anymore 650W Etasis with 4x6pin PCI-E. This bad boy has been in my system for almost 4 years!! and its done mild overclocks, heavier overclocks, its been in rooms at 11 degrees C and in rooms that have nearly been at 28 degrees C... If anyone knows if their in stock still, i think id recommend that bad boy... but it doesnt have 6+2pin pci-e, which is a shame, but can probs handle it if there were adaptors for them. But i still think corsairs build quality, however missing modular on the smaller wattage power supplies deserves big recognition... they look mean, they weigh quite heavily (which usually dictates if the power supply is going to be awesome) and give plenty 'o' juice to those needy systems.