Has anyone tried these? I just got a BC40 for small rehearsals and gigs, and it definitely punches above its weight. Apparently designed in collaboration with Jonas Hellborg. Now I know he's also an RF guy. Anyone have one of the bigger ones? I was most impressed by the (kind of the opposite of Ampeg et al) nature of this amp. Pretty much uncolored, and impossible to break up, essentially. In one early scene in the demo video, he dimes the amp and starts playing. Cool.