Well... all good points above and appreciate the discussion. For the record, I did purchase the powervalve 200 but ultimately returned it to Sweetwater. It was worth a shot.
To me, the tube is pretty much a gimmick. It provides a small low end type of bump (with a slight volume bump) but still feels like a class D power amp to me. Not to say it doesn't have it's pro's and gives you some stage volume with your modeler rig. To me the tones and feel of what I was getting out of my Friedman 2x12 cabinet (with V30's) just didn't seem genuine. I am glad I tried it... cuz now I know it isn't for me. I will probably try the Wampler Pedalhead when it comes out... and return it if I have the same experience. No harm, no foul.