I just ordered one myself. But in the Netherlands there is no options list for the convertible - there's a standard configuration and you take it or leave it. The only choice you get is the color.
It does include the Torsen LSD, Mark Levinson speakers, HUD, 21" wheels, and climate concierge. And if I had to spec it myself, these are the ones I'd go for.
The only stuff I would avoid is the carbon fibre trim, I don't think it fits with the GT character of this car.