Re: Mesa!
Road King - basically a Dual Rec but every other option you could want to brown it out and make it Fender, or small, or big, or metal, or blues. 4 Channels, immense options, TOO MANY TUBES.
2:90 Power Amp - gorgeous tone, though you might still look into VHT's etc.
Trem-O-Verb - gorgeous clean, nice Dual Rec style saturation with some brown tone to it. Love the 5U4G and the sponge it gives.
Recto-verb - pretty cleans, a little sterile for me. Tight gain.
Single Rec - not far from the Rectoverb, nice tone, tight, not that agressive, can be brownish.
Dual Rec - THE sound of nu metal. Immense crunch, I like the triple channel models. Nice cleans, decent loop, GREAT FOOTSWITCH, can do a great rhythm crunch. Can be flubby on low end, and a little fizzy or grainy on high gain - a great amp none the less, many options but easy to make sound good.
I do not know how the 2 ch models differ in tone.
Triple Rec - lots of gain, just more of everything than I would ever need. It rivals the Bogner Uberschall, 5150, Framus Cobra, and even Diezels and Soldanos as gain machines, however, it has it's own distinctive Mesa-ish flavor in line with the Dual Rec. The Cobra sounds somewhat similar exc it's souped up a bit and tighter.
TriAxis - gorgeous distortions, lots of options, one of the best pre's out there.
Studio Pre - never played one, but have heard them (Alan Holdsworth live) and they are creamy high gain saturation a la IIc+. Can't say how good they are.
Maverick - barely played one once. Nice cleans, very saturated gain. A little boxy for me, but I barely remember it.
Lone Star - beautiful cleans, a little more organic and Fender-y than even the Trem-o model (though I would consider it more precise, not necesarily better or as warm). Very warm, saturated gain, but NOT a Marshall type gain. More like a crunched up Mark series without the low end flub or fat Santana-type focused tone. It plays distortion rhythm well. I actually know some shredders who like this amp for its versatility.
So this is what I do as I watch the NBA playoffs. Spurs are killing Sac so I am bored. Go Lakers!