I am currently using the heavy duty TT stand from finite elemente for my Stabi XL (177 lbs). I have also ordered an HRS isolation platform which will sit on top of the stand for additional isolation, since I do not have the benefit of a concrete floor, but instead, am situated on the 3d floor, in an older wooden house. You can see the stand in the pictures of my system. No bargain, though.
The other option may be that active isolation platform that was a subject of another thread recently. They make one that comes with a floor stand, all integrated, and it can support a considerable weight. Price is in the same neighborhood as my combo, perhaps a little less.