I have a Mk IIB without the mods. Out of all my amps it has the best clean and distortion sound. But to get the killer distortion, it has to be cranked up. Got to get those 6L6's hot and sizzling. But when it's loud, it's really like magic. Unbelievable sweet sustain.
I also have a Maverick and a Mini Recto, and a Carvin Nomad. All three have EL84's for the power tubes and those all have nice singing distortion too. Not near as much bass as the 6L6's.
I do have to say that my fav is the Mk IV I have. I got it running 2 6L6's and 2 EL 84's. Yep, sweet stuff that Mk IV!! Three channels, lead boost, switchable EQ, sweet spring reverb. Lots of other features that put it in a class of it's own.
Is that the one with the carpet on it?
Yes they are!! All mine sit on amp stands. Haven't lugged one of those around in a few years!!