OK, I have all of those cabs in the jam space. Uberkab: cuts amazing, tons of low end, yet tight PPC HP8: cuts well, very tight (slightly quieter than Uber) PPC v30: tighter than mesa/more directional mesa v30: huge sounding, can get a little boomy under low tunings, heaviest of all if money is no issue than uber>orange>mesa. if money is an issue, than the other way round. I run the Uber/HP8 full-stack and love the shit out of that combo. Uber/Orange don't have wheels, hence better connection to the floor and resonance/bass response. If gigging lots, just add wheels to the side of the cab.