Welcome Ron,
I have the m3 turbo s and tried to have them running on a PSVANE TC-3 300b amp on the 4ohms taps, this is a budget but decent amp. Was plenty loud but couldn't do the spatial bass any justice and the sealed sub I had wouldn't blend.
I eventually bought a Line Magnetic 508ia (805 tubes), this is a beefy 48watt set with selectable negative feedback and can easily drive the speakers while retaining some of the SET magic - some of it, I would say the 300b was overall more transparent and flashier on voices but then I didn't upgrade the 300b and 805 on the line magnetic... with the line magnetic bass and dynamics are comparable to my Icepower 1200as.
I also tried a budget push pull, the Willsenton R8 and same story bass and dynamics had nothing missing but I didn't like the amp at all compared to the 300b amp, the 508ia is a good compromise - definitely closer to the PSVANE SET then the Willsenton (btw Willsenton have a 508 slightly cheaper then LM).
In insight I would probably got one of the LM 845 amps since the volume on the 508ia never gets past 12 I think the 845 should yeld a more refined sound. If I was in US, instead of trying so many amps I would have upgraded the speakers and spent less money by keeping the 300b.
The thing is all other spatial speakers, including the m3 triode master would have a better time with low watt SET amps. With the turbo s you can really tell what's missing in the bass department by simply attaching some random class d amp.
PS ymmv with higher quality 300b amps. I wrote to line magnetic and they actually said their LM-210ia 300b top of the line amp would have no proble with a difficult drive - hard to say if that's true or just marketing, but quality of transformers definitely plays a role in current drive.
