I just ordered a LR model yesterday.
talk to a sales person and see if they can find you a P3D- instead- it'd be the same 2k for double the boost plus track mode
Yes, unless you are in a rush, or really picky about having a white interior or a particular color, this $2k is better spent on a 3P Stealth. You get more power than with the $2k boost, track mode, and it looks like you get a tiny bit better efficiency too.
The sales person will probably tell you that they will never make these vehicles again (and they could equally well be wrong or right, it is like a coin toss). But if you're not in a rush, it is definitely worth waiting to see what happens. There's no tax credit to worry about anymore.
Also, if delivery is imminent for you (no idea whether they are shipping cars to US right now, or whether they are shipping them all back to Europe), if I were you, I would postpone delivery & payment for at least a couple more weeks to see what happens with prices. There's a fairly high chance of price adjustment in the next few weeks, and they are likely to go down, due to the lack of the $1875 tax credit. No idea what the adjustment will be or where it will be applied, if at all.
You don't have to cancel the order; you can just tell them to postpone the delivery because you're unavailable or whatever. You can do that for quite a while. And in the meantime you can wait to see what shows up in the Stealth department. They want to sell you a car, and if you demand a Stealth...