Bill,
Not much experence here, but all of my equipment is on the ground, mostly between my speakers. I should really update my own pictures as I have the VZN 100 OTL monoblocks from Joule Electra (somewhat in the same vein as your old Tenors).
I agree with you from a previous post somewhere that, in essence, the room can make or break a system. I noticed the most improvement when I moved my audio equipment to a dedicated room in the basement.
By the way, when I feel that I am listening critically too much and not enjoying the music as much as I should, I put on a 20 year old R&R tape and play it through a 20 year old tapedeck. There is no point critically listening to that. This sort of "flushes" out the tension and I start again with a clean slate.