Yeah agreed, if you can afford an Intel CPU with more than 4 threads then buy Intel. If you can't, buy AMD...
GTX970 will take pretty much whatever 1080p gaming you throw at it, the GTX960 would be a bit less capable but substantially cheaper. I wouldn't recommend any AMD graphics cards at all unless you get a top-end one on a ridiculously cheap deal.
PSU - As mentioned, go for the Seasonic, The EVGA Supernova PSUs aren't too bad either.
Memory - 8GB of the cheap stuff
Motherboard - Cheapest board which has the relevant socket really, with reviews to suggest it's fairly reliable.
Or buy your own PC back when it comes up on Ebay... (sorry, couldn't resist it)