I think I've become a single ended tube amp freak to the degree that any transistor class A or A/B or likely class D amp wouldn't stack up in my personal tube laden gear heap, so I might be useless as a general reviewer. This was demonstrated by 2 recent amps I had around for a while, a "Hot Rod" version of my Dennis Had SEP, and a Schiit Aegir. The "Hot Rod," although a slightly newer version of my amp, was slightly less powerful than my "Fire Bottle" version (with identical tubes), and somehow wasn't better so I sold it...the Aegir is simply a good transistor Class A amp and sounds like it. Sent it back as my SEP tube amp sounds utterly better in every way...more detail, more involving due to whatever tonality I seem to prefer, and just seems to make me smile.