Any/all. Seriously, with that CPU - especially OC'd well - you can use any video card on the market. Do you have a max budget?
That's a matter of personal preference. Personally since you asked IMHO I would say that it's better to save the money and go with the 290 cause all you will get with the 970 is the ability to turn on a few more in game graphical settings that will be hard to dectect when actually playing the game anyway.Is it worth splurging a bit more for a GTX 970?
Is it worth splurging a bit more for a GTX 970?
No. Also the GTX 970 is already showing its limitations with uneven frametimes and stuttering due to the weird memory partition in games like Rome Total War Atilla even at 1080p
http://www.pcgameshardware.de/Total-War-Attila-PC-259548/Specials/Test-Benchmarks-1151602/
Is it worth splurging a bit more for a GTX 970?