TX850M or HX750

http://www.newegg.com/Product/Product.aspx?Item=17-139-010

http://www.newegg.com/Product/Product.aspx?Item=17-139-029

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.