I appreciate them all, to varying degrees* (and I like to have ALL the music, or as much as, for me to curate) but at the moment, I would say BSX/DDR are the most exciting in terms of output and obscure titles being released (although I think their choices might be down to a more ‘relaxed’ attitude towards licensing and copyright).
*with Varese Sarabande, Intrada and FSM being the cornerstones for me..