My first tube amp was a Mesa/Boogie MK IV and I still have it today. I actually somewhat dislike the lead tone but the Rhythm tone is fantastic and allows you to use a distortion pedal in front of it which is what I have been using live.

I've been thinking about condensing my rig to just a V-amp and a EH .22 Caliber solid state pedals into my Boogie 2x12. I can still run certain pedals in front of the V Amp - I actually get some cool tones out of that thing and used it exclusively on my first record. Certainly would be easier to carry around instead of the Mark IV!

Joe