I'm looking for a metal-oriented yet versatile head myself at the moment. I've heard good things about the Koch Powertone II head. The Koch dealer nearest to me sucks though, went over there to try it out, and they didn't have a separate room for the amps or anything. So, basically I couldn't turn the volume beyond 0.5 (out of 10, the things got 120w after all) without being told to "keep it down a bit". Idiots, as if you can get any real sense of a tube amp at those levels :)
Still looking forward to trying one out in a proper setting... There's another dealer that's some 50km from here, might have to make the trip there.
Has anyone else tried the Powertone?