Still trying to decide on a rig (more info on my search here) Anyway, I need to zero-in on a head or preamp/power amp to drive an Avatar 212, and also the 212 with a 210 or 410. Would like the amp to have some tube involvment. My concern is having enough wattage to properly drive the 212+410s for loud outdoor use, and also sound good with just one of the cabs at lower volumes indoors. More specifically, will a high-powered rack rig with these Avatar cabs have limited tone options at lower volumes? Your thoughts?