Let's say you've decided upon an open Porsche (a convertible). Being a sporty driver you want an "S". Do you get a Carrera S or save some money and get a Boxster S? Now let me complicate it: Let's pretend Porsche offers an option where you can get a Carrera S engine in a Boxster giving it the same performance and price as a Carrera S Cabriolet.
So your choices are:
1) 911 Carrera S Cabriolet
2) Boxster S w/ Carrera S engine
3) Boxster S and some extra cash in your pocket
As always I'm curious what colour combination you'd get it in.