Boxer
A couple years back I oh so nearly bought a pair of those too.
Price was very very good.
Read many reviews but a prior poor experience with a pair of Bel Canto rf500m class D amps sort of put me off the whole class D thing.
I found the Bel Canto were just lacking in life and dynamics.
And 500w?
Not sure where they were hiding the other 400w......lol.
Good luck sir!