I too received my invitation on 1/11, having reserved last August. I'm hesitating mainly because I'm 6'6" and broad (400# - I look like an ex-football player, but I'm not) and I've never purchased a vehicle without sitting in it first to make sure the driver's position was good and that I could get in and out without cracking my skull or adding new joints to my legs. I was hoping to be able to see one in person first, but I've called the Massachusetts Telsa locations and they haven't received and X - and don't expect to for a couple of months yet. Since the Model S was only a little too tight getting in and out I may just take the chance and order, banking on the taller stance and roofline of the X to alleviate that.
I'm thinking of going with a 90D 'Darth Vader' - Obsidian Black Metallic paint, black leather seats, black headliner, and carbon fiber trim - five seats, all the options, tow package, and 72A charger. I like the 22" Onyx wheels, but I fear Worcester, MA roads would eat them right up. So I'll probably get the standard silver wheels and maybe pick up some black 20" wheels aftermarket. As much as my inner 12 year old wants it, I can't really justify $20k for the P90D. Though if I could get the active spoiler as a standalone, I would. (I asked Tesla, they said no.) I drive a 2006 Dodge Charger R/T Daytona currently, and while it is quick even the 90D is quicker.
If I could find a way to see a Model X in person around here, I would certainly do so. (If I could get work to fly me out to HQ in Seattle I know the local SC there has a few in for delivery, based on reports from a co-worker. But that's not likely in the next couple of months.)