Well the S8 pretty much has the segment to itself until the S63 comes along. Well there is the Quattroporte Sport GT which is about the only other larger sporty sedan around right now. The S8 is a bargain compared to the 760Li and S600, but it doesn't compete with those cars either. The only 7-Series that may have been a competitor the SWB 760i Sport has been dropped from BMW's 2007 U.S. lineup and there is no S63, at lest not yet.

The S6 wisely avoids a direct conflict with the M5 and E63.

M