
The Tesla Model X design studio opened today for early Signature reservation holders. And with it, a good bulk of the unknown information surrounding the X was revealed.
For now, there is a single option, 90 kWh Tesla X, that has an estimated 240 miles (EPA) range, that will zip to 60 mph in 3.8 seconds and has a top speed of 155 mph.
Update: The range of the 90D Model X is now 257 miles, and 250 miles for the P90D - details
A new Signature series Model X will set owners back anywhere from $132,000 (+1,200 DOC) to $144,000. A Signature Model X required a $40,000 deposit, as opposed to a $5,000 security for a 'regular' X.
Tesla has said that the early founder series Model X comes with about a $25,000 premium (as per "free Model X" referral program for first customers to refer 10 Model S sales), the Signature series also carries a premium over similar non-exclusive editions. As a point of comparison, a 'base' P90D will set you back $108,000.
UPDATE: Tesla CEO Elon Musk says to expect a $5,000 premium over similar Model S options:

First deliveries of the Model X start on September 29th!

As for the "extra" things the Model X can do - namely towing, Tesla offers an optional towing package for the utility vehicle that is rated for up to 5,000 lbs.
An option that will set you back $750.

As this is a Signature Model X, additional options are few.
The "Ludicrous" package is still an additional $10,000 but drops the 0-60 a more significant .6 seconds to 3.2 seconds total.

Also there is a "Subzero Weather" package priced at $1,000 adds a heated steering wheel, as well as heated seats in the 2nd and 3rd row.


Update: Mark Z (via the Tesla Motors Club) has uploaded a nifty interior configurator shot.
There is also a fairly lively thread in progress on the subject that we encourage everyone interested to get involved with and check out at TMC.

Hat tip to Jamie H!