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For the PSU, get a corsair. 650W should be plenty powerful enough.
+1There should be no need to exceed 650W for your system. Corsair is rock solid, but you don't have to go with the brand name; they just happen to put out very good gaming gear, so it'll run quiet and efficient and cool. A large PS that has a low efficiency rating can chew up a bit of electricity, thus running hotter (& more expensive).
Antec, Thermaltake, OCZ all good. I have a Cooler Master I'm quite happy with, but it's "only" a 550 watt and I don't push a juiced up video card with it ... however, it does push 5 hard drives without problem,and sometimes two or three USB drives. I'm pretty sure a 550 would handle your needs, but not 100% certain. If I were you I'd look pretty hard for a 600 or 650, whichever turns up at a good deal first. A 700 won't kill you if a good special falls in your lap. You have to estimate the juice your entire system uses (likely under 500W) and then buy something with at least an additional 20% capacity; 30% better, 50% big overkill unless you plan more upgrades.
Anyway, best bet is to check out the offerings at newegg and visit twice a day. They discount power supplies about five times a week. Just got to have an idea ahead of time what you want & then jump on it when it shows up. Probably you can get what you need for ~$65, maybe even $50.
currently "featured" deals:
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http://www.newegg.com/Store/Category.aspx?Category=32These look like solid deals right now:
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http://www.newegg.com/Product/Product.aspx?Item=N82E16817341017 -
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139005I'd spend the $70 instead of $50 & get the 650 Corsair, but that's me. I'm pushing a bunch of hard drives & would feel more comfortable with the extra juice. That leaves ~$300 budget for your card, which is substantial.
Put the term "promo code" in the search box ... it will take you to their full page of specials, which changes every two days or so. Check every day, sometimes they run a 24-hour special with mad deals. Might also find a video card for your needs at something like 50% off.
Current page, not sure if it changes or if the URL remains static:
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http://promotions.newegg.com/NEemail/latest/index-landing.aspx?Tpk=promo%20code