hmm let's see...there's the antec Tp3-430, 430watts, for $95 at best buy; antec truepower trio 23650, 650watts, on sale for $120; antec neo he 550, 550watts, for $127. there are also a couple from bfg: BFGR650PSU, 650watts, for $150 and BFGR800WPSU, 800watts, for $250.
since you said that i'd probably only need 450 or 550 watts to run the 6200 well, i'll stick to the antec ones. so which one is a better buy?