In a couple of games a GTX 960 SLI setup is even better then a single GTX 980 while you save around 100-150 € when buying 2x GTX 960 instead of a single GTX 980, in fact I'm aware that a single GPU is always above multi-gpu setup but we are talking about SLI and not Crossfire. You won't feel the difference here anymore, don't worry.
Though I would always prefer an AMD CPU over an Intel, I would -not go ahead and buy a 3-4 year old graphics card that ;
- consums more energy
- makes more noise
- is not an investition into the future (DX12 aka our Maxwell...)
It's everyones own decision if you either want to buy an AMD or Nvidia GPU. AMD might give you like "5-10%" more power for now as we've seen in the benchmarks, but they are not an investition into the future. Microsoft already gave out the DX12 SDK, so developers could start working on the new API, if you don't mind to be stuck at old games with your 'AMD 2XX series' card, go ahead. They will support DX12 in a way thus only driver based, I'm not quite sure how useful this 'light' version of DX11.'3' will be due to the missing hardware support. DX12 will give an enourmous boost though... oh wait. Those were only the newer maxwell cards 8|... ( http://www.extremetech.com/gaming/187970...-tech-demo )...
