Looking at getting a GK MB FUSION 800... I currently have a Genz Benz Shuttle 9.0. No problems with it. She's in mint condition. However, I'm digging the thought of the 3x12Ax7's in the preamp section of the GK which is leading me to believe it has to be warmer that the Genz Benz.... Is there any truth behind my reasoning here? All inputs would be greatly appreciated! Thanks everyone! Peace!