Obviously Luxury for me, as that's what I ordered
. I had actually started with X-Line, as I liked the default 19" wheel better on the X than the LL; however, I prefer the paint-matched trim on the LL. Since I ended up going to the 20" wheels, anyway, the 19" on the X was no longer a decision factor.
I do think a line is a must, whichever is chosen, simply because the 18" wheels feel way too small for me.