I have had great success with Sound Anchors amp stands on my VTL tube monoblocks, as well as a Levinson 333 solid state stereo amp.
The improvement in sonics was nothing short of astonishing with the tube amps. I just received the stands about a month ago and I am still amazed -- greater clarity overall; smoother highs, tighter stronger bass. I can't say enough about the improvements.
When I had the Levinson, there was a substantial improvement in those areas as well, not as dramatic as the tube amps, but still significant. I felt that I would not want to listen to my system with the Levinson without the Sound Anchors stand after hearing it with the stand.
Bob, the Sound Anchors owner, is a true audiophile and manufactures a high quality product. They are not cheap, but the investment is well worth it.