Yeah, impedance isn't an issue with the tube head. If I ever want to run it off my Crest, I'll be way off maximum power. I've been considering selling my Pro-Lite 2.0 and getting a 3.0 for a while though.
More speakers, more problems...for everyone in the crowd who doesn't want to sh*t their pants.
Your 2.0 bridged into that shouldnt be an issue at all....
Also on an unrelated note... Larry Grahm is a fly motherfunking pimp.