Hi,
I realize that this is the Odyssey forum. I am a long time owner of a Stratos Plus (upgraded by Klaus) 20+ years ago. I've never done anything to it since and have always been happy with it. Great bang for the buck.
I am running this powering a pair of Von Schweikert VR4 Gen2 speakers. Preamp is a Pass Labs Aleph P. I do quite a bit of audio DIY and the preamp may get replaced with a UGS Muse preamp I am building which is similar to a Pass XP30.
I've been considering updating the amp lately. My thoughts run towards a more Class A design or capability. Since the Stratos runs so cold, I'm assuming it isn't biased into Class A much.
I haven't seen much in the way of impressions or reviews of the higher end Stratos such as the Extremes, nor of the Kismets. Admittedly, I don't hang out here much and haven't exhaustively gone back thru the board. So, my questions:
1. How much improvement difference have people seen going from something like my Stratos Plus to an Extreme? Kismet? What other levels of Stratos above the Plus are there?
2. Other thoughts: going with an older amp biased heavier into Class A, such as a Threshold, etc.
3. Going with a modern amp such as a Schitt Wotan or a pair of Tyr monos[/li][/list]
I am reluctant to go with Monos as my system is in our great/living room and I am dealing with WAF factors here

I've never really had what one would call a really high end amp in the syetem. I did try my brother's Counterpoint SA220 in it and preferred the Odyssey (though he liked the Counterpoint with his Apogee Centaurs better). I did try a Marsh 400 in the system, but that didn't work at all, possibly because of the Counterpoint SA5.1 I was using as a preamp at the time.
I probably should call Klaus and talk to him about this and see what he thinks, but thought I would get a discussion going here first to try to congeal my thoughts. Thanks for any input!