i have played a lot of amp heads and two brands just stand out: Ashdown and Peavey Max. These have great tone shaping and i love how they just make a fantastic tone. I am not talking about the additional effects which i can craft from my pedals/modellers. I don't really like the DG Amps(I am a metal bassist) and feel that their pedals offer a better value than their heads which are mostly one trick pony but that one trick they do it better than everyone else but their clean tone isnt something i dig in.