I owned a BAT VK500 w/BAT PK for some time years back. it was one of the last few made according to BAT.
wonderful amp. No question about it.
I sure wish I had not sold it but had to to pursue other aspects of this audio hobby.
there is something about the use of bi polars that produces sounds which can raise goose bumps, though it needs a fine signal, tubed preamp, and really nice, but not 'killer' speakers to really shine.
don't sell it!!!! if anything, ask BAT if they still support it and see about updating the Caps.
Bob Carver does great things for sure... though on the SS side of the coin, IMHO, BAT wins this one.
have fun!