I get enjoyment out of either of my main system amps-custom 125W tube monoblocks Class A/B 6 or 8db of global feedback and 70W tube EAR 890 stereo amp Class A zero global feedback. My best friend has an RM9 stereo Class A/B amp which sounds great as well. I wouldn't choose one type over another on the basis of mono or stereo construction as there is so much more involved just as I wouldn't choose a DAC based on it's DtoA converter chip.
Stereo or monoblocks
I recently bought a pair of the JBL HDI-3800 speakers. I also own a McIntosh C-2300 preamp. Should I buy a used McIntosh mc402 stereo power amp or try to find a pair of a different brands monoblocks? The new Schiit Tyr has my interest.