Uber,
Guess what? I just bought used Halo Integrated (my 2nd one, ha) two weeks ago. Very powerful, dead quiet, and slightly on the warm side, associated equipment dependant of course.
I don’t use the phono stage, it’s mediocre at best w/ very little adjustability. The built-in DAC is surprisingly great. It’s an older ESS 9018 chip, but it’s implemented very well, or at least I would guess from the SQ IMHO.
I went back to using a subwoofer, so the built in high/low pass filter and crossover work very well. Bass management was a huge plus and deciding factor for me. Nice to have that option when needed.
Never heard KRELL, but reviews are outstanding most of the time.
I give two thumbs up for Parasound. And, if you care about such things, Stereophile Class A recommended.