I have looked, not too impressed so far.  quality of circuitry seems to have a lot to do with sound quality.  just tossing the idea around.  The models the HD amps were made from were all very top quality circuits,  most all were hand wired with very good components.  seems a shame to send the well modelled signal through more pcb's and cheap parts.  just an opinion.  The import Bogner stuff does not seem to hold up well from reviews i've read.