The PSU seems fine to me, you can't exactly put another 780/880 in it though, if you want to upgrade. I would also choose the Kingston RAM, like dragoon20005, since it's better value, but the Corsair is a good choice too, if you want it to match your PSU and case.
Anyway, it's good to see someone being reasonable about their selection of PSUs. Lots of people put a 1000W PSU in their build, just because they have a 780Ti.