Gentlemen,
Again, thanks for the feedback.
First, regarding the BMW Xenon headlights... I stand corrected. The Xenon headlights ARE adaptive, and swivel left and right right to follow curves. The problem occured because the ONLY place I could find on the BMW website that mentioned that the Xenon headlights were adaptive was by clicking the "Xenon headlights" option in the build your own utility (which is not working at this writing). Note that the TITLE of that option mentions nothing about adaptive headlights. Search for Xenon on the the BMW site? Nope. Nothing about adaptive. (I don't get that logic, but whatever...)
But wait... The headlight story gets even more confusing. Apparently (to be confirmed), there are many hidden options that are normally not available in the US of A that ARE available elsewhere in the world! These options can be turned on by changing the codes in the X3. The extent that these available options affect the lighting features is TBD.
The X3 models I'm considering are the 28i in either the xLine or M Sport. The primary issue is the seat. I slightly prefer the xLine looks and more utilitarian persona, but the M Sport seat is much better. But the M Sport seat has a couple issues too. Since my back and knees are extremely bad, seat comfort is critical. The more comfortable seat drives my buying decision.
I'm still digging, but right now I don't see any significant advantages of the LED over Xenon except maybe for looks. And I'm not spending $1,900 (USD) for a bit better looks.
On detailing the BMW, I have everything I need except for a new LSP and maintenance protocol. So I just ordered the PBL Elite kit plus booster with some extra applicators. We'll see how it goes.
Again, many thanks for the great help!
Regards,
Dan.