I have an PJB M300 head that I use with a 6B neo power cab.
The sound of my Stingray 5 through it is extremely good - definitely the best I've heard amplified but then I am keen on a clean DI'd tone.
Volume wise, it gets turned up to halfway for small gigs, threequarters for medium gigs. Suppose I could get an additional cab if I ever had a volume issue - but certainly not needed yet!
Best of all it feels nothing like lugging around my old Trace AH250 and 2 4x10 cabs! (which was superb sounding but....well it was heavy on your own!) which I sold to finance most of the cost of the PJB rig.
Even fits into the tiny boot on my car - all in all a very happy customer.
- Richard