I snagged duel 970s last black friday and like them for gaming, but they really cause a ton of screen tearing during browser media playback for some unknown reason. I RMA'd both, tried every fix under the sun related to the issue, and now just live with Netflix looking like it's gone through a paper shredder. Does it in all my browsers, when I switch out the card for a non-970 it goes away, when I put my card into my friends rig it caused tearing as well with both cards. But for gaming they are pretty much the best bang for your buck since the price jump to the 980 is stupidly large.
For reference I paid $260 each for both cards, about as low as I've seen them give or take $20