i would honestly grab a 7770 if i was in the market right now for $150-160 on sale. its a bit slower than my 6870 but the power consumption and size of PCB is nuts
Once these things hit ~140, they could be pretty bad *** in crossfire. I was looking at some charts and they hang with a 7950. Put a little overclock on them and they could really hit some good numbers for 280 bucks. The craziest part about it is that even with TWO in crossfire, they both drink less power than a single 570 .
I wish they made little waterblocks for them, I would have to pick a couple up for fun