Don't forget that the X70 cards are a step down from the top-tier X80 cards. The 980 is the follow-up to the 780, the 970 is the follow-up to the 770, so for it to be as fast/faster than a 780 (Ti) isn't that bad.
So yeah, get the 970
Also, you should really not be up at this time... But neither should I so I'm gonna go now
The Maxwell series of cards aren't that much faster than Kepler, Maxwell is mainly about power efficiency, Think of Maxwell as Kepler version 2.0, Cheaper to make, Cheaper to sell and only a tiny bit faster in certain areas.