I've had the PRS for over a year now, and it basically became my main amp as soon as I plugged into. Granted, I am not a Marshall tone kinda fan...don't really like the Friedman stuff much. Love my 5150s, Mesa Marks, Uberschalls, and to me, the PRS kinda combines elements of the Mark series and 5150. It sounds killer, and is plenty loud to play with my band. I have played every show we've played for the last year with that amp. I absolutely love it.
Don't need 2 amps is coocoo pants talk, though haha...especially 2 that sound so different. I am planning on buying an Engl in the next week or 2 because its a totally different tone than either of my 5150s or the MT15.