I just picked up the 150B. I love it. Built like a tank and sounds fantastic. Love the large screen, VU meters, etc....
Roon/Qobuz for music. Have it hooked up to the LG OLED (HDMI) and seem to notice even better sound/vocals from YouTube TV....
I'm currently using the Mini GaN 5 and will look to try some other GaN options. Been in the Class D camp for the last 10 years (UcD, nCore, Purifi).