Which GPU To Get?

290X is a wee-tad better in performance but I would get the 970 because it uses a lot[ less power, and therefore you actually will save money by buying a lower-wattage power supply.

Power > 290X
Efficiency > 970

Also, don't think the 970 is weak. It's one of the most powerful cards.

Edit: Others say the 290X is actually less powerful, so take their suggestions into consideration also. Basically, they're generally the same.