Tube amps under $7500

My experiences with Tube Amp's both Pre and Power is that they are bettered in their  End Sound when seated upon a Isolated Plinth.

After numerous trials with materials as a Base Board and Footers, the one which to date has made the biggest impression at Tidying up the Sonic being produced, is a Phenolic Resin Impregnated Densified Wood Board, with Audio Technica AT 616 Footers.

A board ss the one suggested is not too difficult to acquire. I am also confident Footers can be found to be equivalent in performance to the 616.

I strongly suggest a support for the Tube Amp is given consideration.  

@audphile1  Rogue now definitely on the list. Had forgotten about them but I do know a dealer pretty well.
@biglou13 , If this means I am wasting my time shopping under $15k, well, so much for the experiment. You did notice I am talking amps, not preamps?
@hilde45  Know nothing about Quicksilver; will research & explore before making any decision.

@curtisvill I am not thinking integrateds at this point as I like the flexibility of separates. Maybe when I enter downsizing mode in a few years.

@hickamore look on a used market. The ST-100 is around $2,000. 
Audio Research would be another recommendation. 
In any case, consider a matching preamp for synergy if possible. 

@hickamore,

Maybe Atma-Sphere M-60 see here! 😎

Mike

@audphile1 Just learned that user must re-bias ST-100 tubes every 4 months. Hmmm, yeah -- one of several reasons I have avoided tube amps. Current Prima Luna 400 has autobiasing. Not sure how well it works, but if it does .  .  .