Newegg is running a sale on Corsair PSUs and I'm planning to upgrade. Right now I have an i5 ivy at 4.2ghz and a 7870 run by a TX650M. Planning on getting a GTX780(probably going to OC it) and would like a little more power. The semi-modular-ness of the 850 doesn't bother me over the full modular-ness of the 750. Just wondering if a bronze certified 850 would be better or worse than a gold certified 750.
Go the gold certified hx750. The 750 would be more than enough to fit your need for 780.