Weseixas
I can't defend the Bel Canto, since I haven't heard one. However, as a long time owner of an ICE amp, I have come to dome definite conclusions. It took years of experimentation.
On my system the Sony would sound terrible. Then again, way before I went class D, and was using Pass gear, NOS players were winners hands down. So, I was an early convert. Now, with the gear I have, the difference only intensifies, remarkably.
The difference lies in several areas. An excellent Sony SACD sound exhibited a severely truncated decay. The stage was both shallow and squished. The tone was cold and tinny. In fact you describe it rather well.
My sound is fully fleshed out. The stage is bigger than my 5 foot speakers. I could go on, but it is just as well to say my sound follows nature. It is a natural sound, in all venues, hard rock, to lizard lounge singers.
These are .8 ohm speakers, with sensitivity at 76 db. Despite that, when I put on a well recorded pianist, I put his grand piano right in the room, turning the volume to 2 o'clock. It is fun to fake out passer-bys.