I have an 'older' Valvestate 30 watt with reverb. I like it, and can make it sound ok. Problem is that it can't compete with a drummer. I paired it with
an Alesis Wildfire 60 watt amp, and using it as a right side of a stereo setup, and leave it in the clean mode. Kinda gives me the 'high end' in my setup and WITH the Alesis gives me a sound I'd match up to anyone. I use NO effect pedals, only the channel switching on the Alesis with an expression pedal.
Probably will get a lot of people turning their noses up at this setup, but I am not expecting the amps to be the crutch for my sound. I'd like to think what is going into the amps has a MUCH bigger influence than what the amp does for the end result.
but...back about the Marshall...the distortion is ok... in the same ball park as any ProCo Rat,
Ibanez Ts9...or whatever stomper you like. The problem I find with LITTLE amps is that they are not pushing enough AIR to get THE sound. It doesn't sound full enough...no balls... That is why I run a stereo setup to increase the "width" and "guts" of my sound...even though off stage it is still going to sound like mono.
I gotta think that the naysayers coming from many people regarding the equipment you can get nowadays just plug in and wank away...analogous to the Saturday afternoon guitar player at Guitar Center. The same with mics, guitars, ...almost anything you can buy. Go back and look at what was ONLY available to the AVERAGE joe back in the 70's and compare it to now... but leave out your "festival stacks"....eh!!..we're talking dinky amps and budget gear for the sake of THIS discussion.
so...don't expect a "mini" version of your JCM800 pushing a slant cabinet. But at REDUCED volumes, it can sound great.