Hi get a GTX 960 which is only a lil bit expensive than the card you choose now, if you want to go with amd, R9 280, R9 285 are also better options.
Also, I would prefer Antec VP550, you need min 550 watt to power your build. Not more than that if you are not planning to use multi GPU any time soon. And i mentioned antec, cz personally i am using it, and this one do a pretty good job.