Here’s a write up of the MF Tri-Vista. I own this integrated, and it’s quite nice. I have upgraded the fuses and interconnecting cables for nice improvements; more delicacy and ’air’.
https://hometheaterreview.com/musical-fidelity-tri-vista-300-integrated-amp/?page=2
It seems like there’s always a Tri-Vista, Nu-Vista, or kW integrated for sale at TMR.
https://www.audiogon.com/listings/solid-state-musical-fidelity-tri-vista-300-integrated-amplifier-js...
I would agree that while maybe not the be-all, end all, they are a worthy consideration in the $3K range. Mine has bested the Joule Electra LA-100 preamp/Bryston 7B ST monos setup in my system (also nice separate components from yesteryear).