I don't see Ncore on your list but Rowland uses NC1200 amplifier modules in its upper end amps and BelCanto also uses Ncore - custom modules in the Black, and Ncore NC500 modules in the REF 600M, which has received all the rave reviews. Acoustic Imagery offers a bare-bones pair of NC500 monoblocks for $2K - for the pair.
Between Rowland, Bel Canto and D-Sonic, you certainly have the price range covered.
Between Rowland, Bel Canto and D-Sonic, you certainly have the price range covered.