I'm wondering which 6970 GPU I should go with?
HIS?  MSI?  Sapphire?  Gigabyte?
I'm going to buy 2 of them, which card will overclock the best/produce more bitcoins?

I might get 2 of these.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814127554
I noticed someone mentioned bitcoin mining in one of the reviews, heh.