Consider an F16 where you can have (sailing single handed)
Mainsail + mast = 15sqm or mainsail, jib + mast = 15sqm
and both boats carry 17.5 sqm Spi.

Scooby, this question is already answered, the A-class has made the choice and they went for the uni rig solution. After 30 years of development the A-class should know, or could it be that Wouter knows more <img src="http://www.catsailor.com/forums/images/graemlins/cool.gif" alt="" />

/hakan