What Graphics Card to upgrade too?

[olliesimmonds]

So i have an older graphics card which is the AMD 7970. Now its a good card runs most the games i need but not enough power for my liking. I want to upgrade to nvidia mostly because of shadow play and amd version is not to great. So obviously there is a big upgrade to a 980ti but i dont think i can justify spending that much on a card. But then when i look at the 970 i think its to weak compared to a 980ti. I use my computer for gaming a little bit of editing i mostly plays less demanding games but do like playing newer game which the 7970 can just about barley handle. So in anyone's option is it worth upgrading to a 980ti for future prof or is a 970 worth it and if i need more power the i could sli? Please help. My budget would be from £200-£400 but if its worth it i could spend the extra on a 980

Also this is my setup:
i5 4690k Devils Canyon 4.3ghz
Corsair H55 water cooling
Gigabyte Z97X-SLI
AMD 7970 OC 3GB
Corsair CX750M
8gb Ram
Crucial M500 SSD 256GB

 

[xapoc]

Two 970s are like single 980ti
single 970 overclocked right is about as regular 980.
r9 390 is like ~5% faster then 970
r9 390x is ~10% faster then 980
so I think you want gtx 980ti