Man...I was looking at a Marshall dsl40...the nice thing with those is that they have got a boost channel thing which is almost like a third channel, so it almost matches the tsl series...In the end I bought a Laney Vc50 combo, 2x12 speakers and full tube...best tone I ever heard, It has it all, and its LOUD.
I play in a hectic sort of post modern industrial thrashcore band (if you will). And I thought for sure I would nees to buy a Boss Od20 distortion twin pedal to keep up with my band...not a chance, it has the heaviest sound I have ever heard, and on the same channel with just a touch of the footswitch it has the most insane classic metal sound...like you are looking for.
I would always go Laney