No doubt this is part of my post mid life crisis crisis, as I'm past mid life. I've played guitar and bass and stuff for 40 years, but.... I NEVER OWNED A TUBE AMP! OMG the shame! And then I come here and read about all the guys who used to play tube amps for years upon decades but they've thrown that all in the bin of history to get a (dunt dunt dunnn) modeler! Wait! I need to know what I was missing! I have a modeler, use it for recording, works great IMO in spite of being 10 years old. I also recently bought a Peavey Classic 20 MH, just to see... can I get something to supplement the modeler, which I will continue to use, for whatever reason? What will I learn about myself along the way? I thought maybe I'd keep both the Peavey and the Mesa, but I don't think that's gonna happen any more. The Peavey's clean sound is fine, and the drive channel has some potential but IMO gets gritty way too early. Plus there's only one EQ section so for any clean/drive switching, it's going to be a compromise. The Peavey's simulated spring reverb is IMO AN ABOMINATION and the more I hear it the more it bugs me. So yesterday I go pick up the Mesa head at Guitar Center (used). Quick impressions to start: a) It hums a bit. It hums more on the Class A 5W setting than the 15W AB triode or 25W AB pentode settings. Not sure why that is, but perhaps someone will explain it. b) There is a weird low level gurgling coming out of the spring reverb, which goes away when the reverb knob is all the way down. c) A couple of the little teeny switches kinda pop when I flip them. d) THE TOAN is AWESOME. The blues channel takes what is between 0 and 1 on the PV drive knob and spreads it over the full range. I didn't turn it up very loud but this thing seems to achieve a nice buttery overdrive sound without harshness. The clean channel is clean. The crunch channel can even be sorta clean. Still have some exploring to do here. e) This thing has a LOT of options. Maybe too many. 2 preamp channels with boost, 2 EQ channels, graphic EQ, 3 power stage modes. f) It probably gets really loud. I was messing with both an open back and closed back 1x12 and on the 5 watt setting, master volume about "1" seemed good. I'm getting in a Captor-X attenuator cab sim thingey next week and will see how that fits into the whole low-volume/headphone/recording angle. g) There are no menus. This is the aspect that I'm most interested in exploring. Will a more straightforward user interface (knobs and switches) somehow improve my workflow or get me to finish the vocals on those songs I've been working on for a year? eh.... maybe not. Most likely, the Peavey's gonna go back and I'm going to build up a second system with the Mesa and a few effects pedals (with its own looper, natch) to see where it takes me. I did go back to the modeler and flipped through some different amp models on that. That thing sounds pretty dang good too!