I owned a dsl50 for a years time before trading in for my boogie. Before purchasing, I played all of the dsl and tsl series, and they all had an extremely similare tone. The main issue I had with this tone was..
1.No matter what I plugged into these amps, almost everything sounded the same. P90's sounded like humbuckers, hot single coils sounded like humbuckers, and I wasn't able to tell the differce between a guitar loaded with an Invader and a Jeff Beck. Never mind differentiating between maple and rosewood necks, or what kind of wood the body was made of. It was a decent tone, but everything had the exact same tone.
2. There was this everrpresent buzzsaw type tone to it, that was there anytime there was enough gain to really dip into the harmonic content of the amp. I know voodoo can mod them to fix this, but thats 400 bones american, and marshall should have made this amp as good as it could get before selling it.
3. The nomad I tried and bought just seemed to do the marshall thing better than the marshall. It way more alive at lower volumes, and the harmonic spread was alot more lush and much more pleasing to the ears.
Sure the marshall did alot of thigns great, it had a hugeee thumpy bottom end with the deep switch, but the highs were kind of harsh, and the tone controls did next to nothing. Plus it sounds like every rock band playing music right now thats not using a recto. How can you find your own tone with that amp when it sounds like everyone else?