What do your think is the advantage to a Sig reservation. I know there are some special trims and colors made, but as far as the Model S goes, I felt kind of bad for the Sig owners, they missed alot of improvements in the first year. The big ones I see were (slower supercharging, inferior A/C system, door handles, etc) Granted some of these issues were resolved with retrofits but some I believe were not. Could any Sig Model S owners opine on any benefits I am missing, would like to reserve soon. Thanks.