[Rant]
Personally, I was/am tired of every car manufacturer deciding to ram a sunroof down my throat without my consent. Seems everyone is making them standard (i.e. Audi, BMW, Lexus) which irritates me no end, because I am tall and need the extra 2". I was considering a couple of Lexuses (Lexi?) until I went to the dealership and tried to sit straight up in a coupleof them.
For the person saying there is no difference in the G8, you are mistaken. I sat in two G8s right next to each other, one with and one w/o, and the one with was missing headroom. Every car I have sat in with a sunroof I have hit the headliner in. I had to special order my Trailblazer SS with no roof because I could not sit in one that had a sunroof.
Add to that a number of other factors for cars with sunroofs like: (1) ease of break-in (2) structural integrity compromised (3) the eventuality of leaks (4) etc., and I'll pass on the roof.
[/Rant]