I just got a pair of Adipowers and used them for the second time tonight. I got them the same size as my dress shoe, 1/2 size less than the shoes I normally wear(Patagonia hiking shoes). I had been squatting barefoot, so the first time in the new shoes was a little strange, but they felt better tonight.
If you live in Canada, you can get the Adidas Power Perfect II (I believe they've been discontinued in the US). They were $100 before tax, so they're not much more expensive than the Power lifts.
If I am correct, I own the Adidas Powerlift 2.0. I have had them for a year (with hella heavy squats, dead, and other pulls) and they show no extraneous signs of wear. The heel, as I have experienced it, is incompressible.
Adidas has a sale going on right now. Just got my daughter a pair of the pink powerlift 2.0 for 76 shipped