If you wanna go for an all-in-one moddeling-amp
I strongly recommend the Vox Ad-VT series, my brother owns one, and, my god, it really rocks! The models all sound superb ( and recognize nuances in your playing, which can't be said of a loth of moddellers) plus, its a half-valve-amp, which makes it sound even better. Gotta check them out for sure, the prize is really ok to!
website: voxamps
Ofcoarse, marshall still makes topclass-amps, but by explaining that I would only repeat what Rattlehead said.