I don't know about the MB800, although I hear it's an absolute beast. To be honest, I use IEM's 95% of the time, so I have only opened up the Fusion a couple of times on outside stages. It sounded fabulous, but I was only carrying the stage. The line arrays did the rest. The MB2 500 I had punched like a mother, and had every bit of that immediate whop of my old 400RB. The 1001RBII is a bear that doesn't know when to quit. Funny thing though, I've never A/B'd them, but many prefer the sound of the 700RBII for some reason.
"The greatness of a nation and its moral
progress can be judged by the way its animals are treated"
Mahatma Ghandi (1869-1948)