So I've just come across an available SWR SM-400s head for a great price at a local store and am going to have to go see how it handles itself in the next day or two. Anyone have any reason why I should or shouldn't get this amp? I have been using a Fender BXR 200 and it just isn't enough power anymore, I think it's dying on me. My cab is a Sunn 4x10. I play prog/alt/classic/rock/metal/blues/funk.