Right now, the HD 7870 XT is the bargain card of this gen, and the jokerCard is a perfect example.
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The HD 6990 then was the last beefy multi-GPU card straight out of the state of Texas. Luckily we don't have to rely on the ten-gallon-hatwearers for all our AMD goodies though.
In the Club 3D imaginatively titled 8800GT we find that our dreams have finally come true. Available from LambdaTek, this is a no frills, no added extra reference board clocked at 600/1800/1500MHz.