I don't know what kinda music you play, or anything other than you have 3 choices.
I have a hotrodded Marshall, a 2205 model with Groove tubes, the El34's got swapped out for 6550's. Kinda of add a few hundred to the cost of the amp. Its pretty versitile, channel switching, reverb, line out and effects loop.
Ive played alot of amps, and its definitely something you should do. Alot of Marshalls suck to me, but some that don't. Each company has slight variations in tone depending on when it was made. There are Soldano amps and Randall amp, I like the Randalls and a couple of the older Crate amps for certain things. I had a Dean Markley for clean stuff that worked well. Try em out, see what tickles your ears, ya might end up with something different.
SoMm