What did you decide Zybane?
Decided with a 90D MS. The major reasons for me: Model S is a very attractive sedan/fast-back vs the Model X's marginal cross-over looks, don't need 6-7 seats, the Model S has more practical storage capacity since the X's second row doesn't fold and the MS will be faster and have longer range with the same battery configuration.
Those are just my priorities of course and everyone else is different.