I've been playing my Thornton Fusion (strat redesign) through a LSS Head with a custom 2x12 open back cab. Such sweet tones, and 2 channels to boot. I love it. Then came the Mark V. I ordered the head....waiting....waiting....waiting.....cancelled the head. My dealer however, received a Mark V combo. Now, I've tried the Road King combo with mesa 2x12's and didn't care for it, so I was very skeptical about the speaker in the mesa Mark V combo. HUGE MISTAKE ON MY PART. I tried the combo.....mmmm...sounds pretty good (could be set up better...but hey, everyone is tweaking it on the try-out). The Mark V was on an amp stand...so we hooked to a rectifier 2x12 closed back cabinet, and HOLY MOLY, the low end was killer. Went back the next week, they still had it.....really tried it out this time......WOW, this really is good. So, I'm thinking to myself....I've got a 2x12 closed back cab, and with this 1x12 Mark V combo, I've got a pretty good range of options. So I went crazy and bought it on the spot (it's nice to be an adult with good credit). Took it to my practice room, put it on the carpeted floor, turned it on.........OMG...the whole sonic character filled out....simply bloomed with a 3D effect. Now the tough part...dialing in my Fusion. Now let me say this: Chuck Thornton is a Master Guitar Builder. His Fusion is a redesign of the Strat with the following emphasis. No heel, deep set tenon, bolt on neck. (http://www.cpthorntonguitars.com) It is a S/S/H set-up with Lindy Fralin pickups, Fralin/Thornton/Shapiro design electronic wiring, including a Grosh design blend for the neck and hum pickups. Enough said. Almost immediately the tones of channel 1 produced the same effect in me as my Lone Star Special. I had heard that the cleans in the Mark V rivaled the LSS. I can say without a doubt this is true. The LSS is a little creamier in my practice room, but on stage some of those killer sonic values are lost in the larger/harsher venues. I use Channel 3 of my MV for my blues sound...a little bit of push and crunch. And then I use Channel 2 for the ZZ TOP tones. Also, the tonal qualities change as the volume changes. The mid-volume range is simply excellent and will handle most clubs. This is one powerful amp.
Overall, I am ecstatic about my new Mark V Combo. It really is a superb, superb amp. I'll be selling the rest of my stuff now. 8)