The amp and cabinet modeling is really very good. I've owned some high end rigs, all 4x10" cabs and heads by Fender, Eden, GK, Hartke, Ampeg. Most of the modeling presets need a little tweaking to get the desired or preconceived sound. But I can tell you it comes very, very close. Toss the matching 210 cab under the combo and you've got a very capable rig. I play with 2 guitar players, 2 keyboardists (one plays guitar on some songs, one plays sax on some tunes), plus a drummer. So potentially 3 guitars, drums, keys at the same time and the Stage 800 can cut through. My current favorite preset it's "Workingman's Bass" with the reverb bypassed and the OD dialed back a little. Perfect punch and bottom to grit ratio for my new J bass.
So, if you want the modeling don't let the combo deter you from giving it a true try out.
Rumble On!