Yeah that could be good. Although I doubt they'd sell that well considering most people would like to have the full songs with vocals and everything. It'd be great to hear the albums just purely as instrumentals though. Maybe there could be a disc released similar to what the metal band lamb of god did, where they released the album with a second cd including the session tracks so that they can be mixed at home so certain things could be taken out of the songs and the fan could make their own mix.