Small form factor integrateds

Going back to looking for a small form factor integrated for a desktop placement of electronics running PC to USB. I know about Rega Brio, Heed Elixir and a used Bel Canto. Anyone ever compared any of these? The Bel Canto is I guess a Class D but reputed to sound excellent and high powered. It could be a multi use am which is why it made this list (plus costs about the same as the others used). Any comments on sound for these? Will be driving Spendor S3/5 on bookshelf in home office playing a wide spectrum of music. Thanks.