Which is more bang for my buck, 5870 or 6950?

as its cheaper and has more stream processors i would say that get hd 5870 they are quite cheaper nowadays and they are having great performance.you can check out benchmarks here.
http://www.jagatreview.com/2010/12/review-amd-radeon-hd...

For an $80 price difference, I would opt for the HD6950. It unlocks to an HD6970 and will perform better at high-resolutions. Have a look around for some benchmarks! I think there are some on the 'Charts' page here at Tom's Hardware.

Best answer selected by Gogators.