The irony is I went there dead set on buying my first Marshall Amp. Actually tested 5 amps at once. At the end of an hour even my playing partner, who is a Marshall guy, told me the BJ sounded best with my Elite Series Tele and playing style.That's kinda surprising to me. Although I upgraded the speaker to an old Greenback and I think it slays any Deluxe Reverb I've ever used, let alone the Blues Jr!
I'll agree with all that. Except......the 40 and 100 do a great job at versatility and being able to get your favorite sounds at any volume, but they don't really master the Marshall sound. While they certainly can get very loud, once you get the power section cookin', that's not where they excel, and the power tube overdrive/distortion isn't as pleasing as it could be. Those two models especially seem to have been designed tio get full amp sound in the pre-amp and most well suited to using the power section jsu to amplify.
I think the DSL20 is the best of the bunch and even the combo can sound great if you upgrade that horrid stock speaker. Maybe that speaker would sound better once broken in, but I couldn't stand it long enough to find out! It can cover a lot of Fender-ish and Marshall territory. It can get a bit loud, without a good attenuator! I own both a DSL40CR and DSL20CR and will be selling the 40! I think the 20 actually sounds much better than the 40, but needs to be well cranked to really give up its goods!
Just Sayin'
Gene