So this is my first foray into the Marshall world. Normally I'm a Fender guy. My first Marshall.
At this store (Dave's Guitar Shop) they had both a DSL 100 and DSL 50. I played both and found the 50 to be plenty loud but also had a slightly more likeable tone to my ears.
I REALLY love the green channel with crunch engaged. I find it to be a perfect classic rock tone. I'm a classic rock guy, that's the style I play in (Young, Perry, Page, Slash, etc). I plugged in my old 1964 Gibson SG Special with P-90s and got a great tone. I also plugged in my R0 and it sounded great also. I definitely am very happy with the amp thus far. The 2nd gain channel is a bit much, lead 1 is usable but lead 2 is a bit too metal for this 70s rock guy. I can always gas up the green channel with a boost and I think I will hang with that for now.
I've had a Marshall cab for years laying around. A JCM900 straight cab with G12T-75s. But no head until now. I find I really like the sound of this amp but I'm thinking of a speaker swap.