Since I can't yet post in the Hardware section, here I am.

Given that the price of 58XX cards has gone off the charts, I figure I should stick to the current gen and hopefully be able to sell them down the road.

I can currently either get three 6870s or two 6970s. I would add a 6990 to my dilemma but they are out of stock.

Which would be more cost-effective, in terms of MHash/power consumption?

Thanks!