My PC build Please Review

Hey guys here is the parts list for the PC i am going to build its going to be a few months until i build it so nothing is perminant. I havent decided on some of the parts im going to be getting so if you could help me and tell me what to get and why. Also if you want to reccomend any parts i dont have listed feel free to just tell me why. I will list the parts that i am choosing between and for any GPU or CPU reccomendations please put link or tell me recent benchmarks showing me proof why i should get it.

Case: Cooler Master HAF-X or NZXT Switch 810 (For other reccomendations the case has to be a full tower and be able to easily fit a dual 140 mil radiator with fans)

PSU: CORSAIR Professional Series Gold AX850 (CMPSU-850AX)

Motherboard: ASUS P8Z77-V PRO LGA 1155 Intel Z77

CPU: 3770k

GPU: MSI GTX 670 PE, Gigabyte GTX 670 Windforce or Gigabyte 7970 Windforce, SAPPHIRE 100351SR Radeon HD 7970 (For any other GPU Reccomendations the price has to be below $420)

RAM: CORSAIR Vengeance 16GB (2 x 8GB)

HDD: Western Digital WD Black WD2002FAEX 2TB 7200 RPM

CPU Cooler: NZXT Kraken X60

Budget?

under 1800

Forgot to ask, What will you be using it for?

gaming

Managed to fit a Titan in there.

https://pcpartpicker.com/user/armypig/saved/1sNM

i will keep that build in mind but how dose my build look as i posted it and also which case should it get out of the two and which GPU

 I would reccomend the NZXT and 7970

which 7970 

I've heard bad things about the cooling on the gigabyte cards, so I would go with the sapphire

 

You dont need to spend that much if you do not want to. http://pcpartpicker.com/p/Qm7k

http://pcpartpicker.com/p/QmaX