Yeah, I liked Mars Volta guy too. As for robot vocals, usually I find they're low enough in the mix that I just don't notice them. But then, I don't usually listen to Focus all at once in general...
Still, they're the only real band to have successfully done the jazz-metal thing - at least to my knowledge.
In fact, this is great timing, because I was gonna ask if anyone could give some good jazz-metal recommendations. That is, besides Cynic, Atheist, Aghora, Pestilence, Death/Control Denied, Lunar Sphere, Spiral Architect, Zero Hour, Spastic Ink, Watchtower. Those are the ones I know (and I'm realizing I don't know very much in the genre at all, which upsets me). So, can anyone help me out yet?