I always found the Randall stuff to be lacking slightly compared to vintage iron in a Plexi or early 2204 but with the right module and one little secret.. the whole thing can come alive. It's a solid rig for sure and mine i would say is finally on par or at least at 95% with my JCM800.
So the secret.... ya gotta run the volume on the module itself, past 1 pm. I usually set mine around 2 or before 3. This means you have to keep the volume on the actual amp lower because like a JCM it'll get loud. If you don't do this and keep turning up the master, it just seems like it gets a bit louder, but that it is thin or lacking or fizzy. Krank that volume on the actual module and get that volume up on the amp and you are cooking. It's a great rig. Randall RM100 + a brahma module for more vintage crunch and grab something a little more high gain for lead tones or just boost it. Keep it simple, there are far too many options and you get carried away buying 4-500$ modded modules which you dial in the exact same way you would a stock module.
One knock against the amp though, $hit effects loop. It sucks. Can't handle pedals and I had problems even with line level rack gear. Wimpy signal. Again, it was "lacking" used that way. Straight up with volumes up, you have a kickass amp.
If I were buying a DSL though, I'd go old.