The normal Audyssey has 6 positions & their higher end system has even more. Personally I would lose interest after 6 positions & for most home setups, 6 is more than adequate.

As for CC Speaker vs Phantom Mode, after playing around with them yesterday, I'm staying with my Sony CC speaker (space limitations). Even though it is not an Axiom & not exactly timbre matched as I've stated before, I suffer absolutely no detrimental effects when enjoying normal real-life material. The only place I hear any small difference is during pink noise test tones; however, the center Audyssey ping test tones sounded quite similar to the L & R M22s.

AVS link - lots of different positions & arguments, sometimes heated, but interesting nontheless: