Antec High Current Gamer M Series HCG-620M 620W (Modular)
Review:
http://www.hardwaresecrets.com/artic...-Review/1495/1
OCZ ZT Series 650W (fully modular)
http://www.compusa.com/applications/...mtDXEcUazYbnrw (a lot cheaper)
Review:
http://www.hardwaresecrets.com/artic...-Review/1418/1
SeaSonic X Series X650 Gold (SS-650KM) (better, similar price with promo code, fully modular)
Reviews:
http://www.hardwaresecrets.com/artic...y-Review/837/1
http://www.jonnyguru.com/modules.php...Story&reid=169
A
good ~650W should be plenty unless you want to OC the absolute batsh!t out of everything or plan on SLI.
There's no point in going total overkill like 800+W, unless you want to keep the PSU for like 5 years a.k.a. multiple system generations (if the PSU lasts that long that is)