bel canto and wyred 4 sound

Magfan, aside from adding an input buffer, I know for a fact W4S does modify their modules.

Fuji/Gala... :D

Yes, caps are changed in a couple of locations.

I'd love to be present for a Class D comparison too. Off the top of my head, the only others I've heard were Bel Canto's TOTL monos. They sounded good too, but were in a different rig/room so not really much of a comparison.