Very good except for a few things. The H80 sucks. For the same price go with either a Noctua NH-D14, Thermalright Silver Arrow, or Phanteks PH-TC14PE. All 3 have oodles more cooling performance, and they are air oriented. As for the GPU, you can't beat EVGA when it comes to NVIDIA cards.
ehm, why is EVGA better and this is H80i - not H80
EVGA has the best customer service around, and their build quality can't be beat. And their cards come with a special cooling system which pushes all the heat out through the expansion slots to the rear so that it does not float up and heat the processor.
I would not change anything in your build -- it looks really good!
Nonetheless, if you follow the advice of getting an air cooler instead of the Corsair H80i, then make sure it will fit properly in the case, and the CPU cooler will not touch the memory.
Corsair Vengeance has a quite high aluminum heat spreaders that can be in the way of the CPU air cooler fan, specially the double fans configuration of the Noctua NH-D14, which is really a good cooler.