A place to discuss features that could be optional on Model S. I will start it off with: Sport model ( 0-60 in 4.4 instead of 5.6 - requires 300 mile pack ) 230 mile pack or 300 mile pack ( beyond base 160 mile ) 21" wheel upgrade (instead of 19") Aerodynamic wheel upgrade Adjustable height 'air' suspension. Panoramic Moonroof Interior wood trim options Metallic or Premium Paint Custom paint colors(?) 2nd charger (20kW total instead of 10kW) HPC (20kW home EVSE, if you need more than the likely included 10kW UMC2) Add on GPS/NAV (beyond base Google maps.) 3 row rear facing child seats (?) The initial 1000 signature models will probably come with most of those options standard, although I think Sport model upgrade is probably optional even on the Signature. Word is that the panoramic moonroof and rear-facing seats may be optional as well. The above list is just a start. The online design studio has a section called "Options" that isn't live yet. I think they said they expect customers to lock in options 3 months before delivery date, so they still have some time to plan out the exact options list. I don't think they have mentioned any pricing for options other than $10K for the 230 mile pack (over the base 160) and $20K for the 300 (also over the 160).