I am on the rim of buying Model X. But the price is really high if I add many options. 6 seater is a must otherwise I would go Model S. Also I want to have the $1000 climate control. Then here come the AP and thd Full self driving. Without AP it is meaningless . But that's $5000. Fine. Full Self Driving is an option that I can install later for $4000 instead of doing it for $3000 now. However, as you know, the actually activation date is unknown, maybe end of 2017. It doesn't make sense to have it now. So what do you think?