I've got the Promaxima stands as well. So far, they're working fine. The ones I got wobble a tiny bit due to a slight uneveness in the base, but it's not a safety hazard or anything (at least with the weight I'm using).
Price, including shipping, was a bit over 200 for delivery to NYC. I've heard that the prices may have gone up recently though.
Oh, they did send the wrong color, but I didn't particularly care about that.