I currently own a Mesa Boogie Strategy 400, a Mosvalve 982 (1 space version, 80 watts per side or 160 watts mono bridged), and a Mosvalve 942 (250 watts per side or 360 watts mono). I used to own the Mesa Boogie 20/20 Dynawatt power amp. It sounded great, but I always felt it was lacking in volume. Having used the stock MP-1, then the 3TM modded MP-1 preamps for many years, from gig experience, the tube power amps have more compression and sag that gives the preamp a nice organic tone. The liquid sustain that I get when I play on my 3TM mod MP-1 preamps when playing a crunchy rhythm or a nice lead part in full stereo puts a smile on my face! I also like the Mosvalve power amps for their reliability & lighter weight, but am not 100% on the tone though. I prefer the Mosvalve power amps for a wet/dry/wet or wet/dry set up to amplify the wet signal coming from an amp or preamp.
Guitar George