Just make sure that if you have an aftermarket heatsink, there's enough clearance for the RAM heatsinks. If you are still using the stock heatsink you will be fine.
As for the RAM, Corsair always makes good stuff but there are 16GB packages of RAM right now for way cheaper, and I mean like $20 cheaper. Look around on pcpartpicker and find the best price.
Yeah it should clear it since the old vengeance fit no problem, I would assume there the same size.