Hey Shep,
I'll post a response to your initial query. I started as a big power ss guy in the mid-90s (Aragon amplification with Martin Logan speakers). Went from than to low power SET (Wright 2A3 monos on DIY single driver voight pipes and then Klipsch LaScalas). Got the Tripath bug in early 2005, so I ordered the SI T-amp. It arrived and I was immediately blown away by the detail and low end torgue, so it quickly replaced the Almarro A318 SET I was using at the time.
Over the course of the next year, I tried a Clari-T and then a Super-T. Guess what I'm listening to now? I'm back in SET land with an ASL AQ1005 300B amp. Still have the SI amps hanging around to play with once in awhile, but the SET amps seem to draw me in emotionally in a way that the Tripath amps don't.
I think the little class T amps are extraordinary for the money, but I found that I gradually stopped listening to my system during that Tripath year. Had the same experience when I bought the Martin Logans back in the 90s...was dazzled when I first heard them, but then noticed that listening to music became less fun and more of a chore. I was always a critic when listening to that system, and I became that again when the Tripath amps were in the chain. When the SET is in there, I am more likely to just relax and listen. Isn't that funny?
I think the LaScalas have something to do with it. The Tripath amps tend to wear me down, while the 300B and 2A3 amps just keep me and the music "lit from within."
I welcome your response/comments.
D.