As a GTX 780 owner, I would recommend no one buy a 700 series Nvidia card until they fix their crappy drivers. Right now, every driver that officially supports 700 series cards has a serious memory leak that will lead to stuttering, multi second screen freezes, and even BSOD after your computer has been left on for 36-48 hours or more. The only fix is to modify older drivers that don't officially support 700 series cards, voiding your warranty in the process.
This has been going on for over a month now for many many people while Nvidia hasn't even acknowledge d the problem. I would think twice about buying one of their products. They seem more interested in in developing a mobile gaming platform that no one cares about, than fixing problems with their other products.