I have gigged quite a bit with my Rumble 800 the past year. The DI sounds really good and it is almost the perfect gigging amp (could use a mute switch). ... ... ...
You know, Link, per a lync in the Rumble Talks of your Rumble Wiki page, if you don't need the built-in Overdrive then turning both the Drive and Level knobs fully counterclockwise makes the Overdrive button an effective mute switch.