only ever used 1 peavey bass amp, the tour 450 head,
on the + side.. a very clean sounding amp, very full and flexible EQ, well built, not too heavy (rare for peavey's i know)
on the - side, its not a very loud 450 watts, poor DI out (doesnt appear to be a post EQ option), doesn't appear to like being driven hard wimps out relatively easy when driven hard, nut in fairness to the amp, i changed band and joined a much louder band, for my previous band it performed faultlessly and i like its tone.
i've used a couple of peavey bass cabs, 115 BW black widow loaded 15" ported cab, didnt like it at all, a very middley box, no definition to the lows, heavy and awkward.
and i've used (borrowed) a 4x10 TVX, definitely a good value cab, i found it very boomy in the lows, but with good EQing can sound very good.