I scored a DSL 100 dirt cheap. I got it for a wet amp and to get a decent Marshall crunch. Tossed some new glass in it and it rocks. With an OCD in front it rips! parametric in the loop tweaks it just right.
It is a dirt cheap amp that sounds good. For heavy grind I never use the deep button, and boost it.
I have played a VM. Better stock amp at 2 to 3 times the price. Once you boost it and put your fav tubes in, not sure how much diff it would make to me personally.
It isn't a perfect amp, but it does a lot of things well and it gives a great rocking Marshall tone on the cheap.