I'm pretty new to the whole stack thing, but I've been absolutely floored with the Mesa Recto 2x12 cab I picked up for my Marshall TSL. What really did it for me was when the TSL got, um, baptized in bud light and was in for an emergency retubing, i borrowed a friend's DSL-401. An amp that sounded flabby in the lower registers and fizzy on top on it's own suddenly warmed up, tightened up and deepened, and smoothed out and just SANG through the Mesa. Like night and day... You gotta watch the low end, particularly on the clean channel, for me, but this is a sweet sounding cab. part of that could be the open/closed back thing, for the difference between the two, but some of it is from the cab, too.