It does help us if you post an overall budget. I would suggest for decent gaming components then Intel is the better option. Sorry I see that you have bought motherboard and CPU.
You certainly do not need all that rRAM 8GB is more than enough for a decent gaming rig. If you can afford it then the GTX 670 or if you want to stay with AMD then the 7970. PSU nothing more than 600W as that is plenty and modular means less cables cluttering up the inside of your case.
You will probably find a 128GB SSD is more than enough for your operating system and can I suggest 2 x 1TB HDD's one for your games and the other for your Docs,Music pictures ETC.