I do not own an Express...they do remind me of the highly versatile dual caliber series of amps boogie offered a few yrs ago...not a lot of tweking...great cleans..mid crunch..high gain all there...
is yours a 1x10 or 1x12 combo?
boogies are relaible..built like tanks....
I currently own a triple rectifier, a Mark II C+ Coliseum (john Sykes!) and a Mk II C+ Simulclass, and have owned a Mark IV AND a DC
-very reliable :P