Upgrade from GTX 660 to either 780 or 970
So I am thinking of upgrading from my GTX660 to one of those two. (just seems to be time) Since the 970 seems to constantly be out of stock, and the 780 is the exact same price, is it that much better than the 780? Or should I just wait it out for a bit. I play WOW and SC2 currently, but I am wanting to play Shadow of Mordor and Dragon Age when it drops.
My current full system is in my signature. I was hoping someone could shed some light on this.