The Bel Canto SET i40 was a great amp, as is pretty much everything Bel Canto has fielded in any type of electronics. It was the first modern 845 amp I heard and I nearly bought one, then decided to spend more to go further up the development path in 845 amps, where I settled on Audion. The Bel Canto is unfailingly musical if less resolving and dimensional than a few current, more expensive options. When an 845 intender finds one of the scarce Bel Cantos on the used market, they should lunge for it if it meets their price criteria, expecially if a one-box solution is what you have space for.
Phil
Phil