SET vs Class A vs tubes vs Class AB amps

I like my SEP lower powered amp, as it simply sounds far better than any other amp I've used in my current (or previous) system, possibly because Dennis Had knows how to design a brilliant amp that I can afford (I saved over 50 grand by not buying a Kondo Audio Note with similar output)...I'm evaluating a "Continuity sort of Class A" Schiit Aegir (also relatively low powered) that so far has shown some interesting tonal characteristics, and might earn a place in my amp collection...it has to pass a background test and be vetted by a committee before taking an oath...takes time. So far I still prefer my SEP, and yeah, you do get chained to a "different class" of speaker where high efficiency is paramount...my current main speakers are supposedly 99db efficient, but I've had good luck with a 90db or so pair as well...it's just nice to have more headroom from efficiency.

@wolf_garcia 

Interested in your experience with Dennis Had amp. Is there a thread/post you could point me to?

Horacio

All SET amps are class A by nature.  In a class A amplifier, the output devices are biased on for the entire waveform.  This is why they are lower power output when compared to similarly sized class A/B amps.  Some of the best amps we've heard are class A, but it's really about the overall design and build.  Plenty of fantastic A/B and other output type units out there.  

All are great if done right.