Look for a 7870 tahiti le, since it's better than the standard 7870, it has more shaders and the tahiti gpu, you can find some at about the price of those.
There's the Sapphire 7870 XT, PowerColor 7870 MYST. Edition.
The store near me does not have the tahiti pcs so if I were to back order it, it would take 3 weeks. Should I pay an extra $30 to get the gigabyte 7950 windforce?