Which of these PSU's is best for my rig?

Solution
Still overkill, you can go 720W HCG antec and more than enough power.

Yep, you can not go wrong with the HCGs from Antec, they are great and VERY well priced.

Trent Quan-Sing

Honorable
Jun 5, 2013
75
0
10,660


I had a HD7950 not long ago before I upgraded to a GTX 780.

I only had a 650W and it was running fine.

I killed that PSU with the GTX 780 and I'm now using the HCG-900.

Works great, so if you are thinking of upgrading in he future maybe just shift to the same to be sure.