Spooner15 :
Yes the GTX 970 is better performance per dollar. But the GTX 980 is the fastest single GPU on the market.
For how long? December the 980ti will be available. I had no trouble deciding to go for the gtx 970 sli setup. I paid $50 more and have a huge performance difference. I figured when the 980ti is available, it will obviously out perform the 980 but the price will be a lot more. 970 sli still takes the cake. Imo, it's one of the best bang for buck cards that's ever come out the past decade, sure you can argue that but lets face it, at $350 you get a card that when overclocked, outperforms the 780ti and is half the cost.
For the price of one gtx 980, you're going to get a lot more performance out of sli 970's for a teeny tiny extra cost