I'm considering a Kemper, but I'm having a hard time letting go of my tried and true tube amp with pedals. But I recently played a Kemper for about 20 minutes at a local music store and thought it sounded great. It was fun to play with a cranked JCM800, and a cranked Deluxe Reverb, at bedroom volumes. Seems too good to be true....so what's the tradeoff? What am I losing by giving up my tube amp and getting a powered Kemper?