Killer system but a word of caution on 1440p gaming and expectation management. You can see from the link below that if you are playing BF4 you won't be able to average above 50fps at ultra - and that bench is single player - multiplayer will be lower.
http://www.tomshardware.com/reviews/geforce-gtx-780-ti-review-benchmarks,3663-5.html
Again, awesome system just don't expect to be able to run flat out ultra on all games.