V30s would be a safe bet for any Diezel IMO. I run my Hagen through a veteran 30 badger cab at home and a Mesa 4x12 with v30s and it sounds stellar, not even a trace of muddiness. With the ch3 preamp vol past noon it is best described as a VH4 with an more complex midrange like an added touch of an Engl savage and 5150.. Mine is a monster, might also try to swap some tubes