This thing is a little beast. Fantastic sounds. MIDI capable. Great sounding onboard effects. Redbox DI built in as well as noise gate. Independent EQ's on all 4 channels. Adjustable wattage (I use mostly the 18w setting). And best of all, 17 lbs. GET THIS AMP!
The Grandmeister seems to do it all. There's reasonably good tones (if a bit toppy in use), it includes many effects right on the amp, the output is variable and there are four channels all with boosts.
Overall build quality is good, but the amp does tend to run a little bit hot in the studio. Its a small amp and can easily be carried around. The floor pedal is recommended.