Hi, my first post but I have been lurking here for a while, reading.
I have just let go of my M-XR order slot as it is clear that the M-XR isn't going to be available with the lowered suspension option (at least, not initially). Indeed, I have plumped for a 23 model S-XR that is in stock as you cannot even get the 24 S-XR with lowered suspension if you have the M pack.
Anyway, just FYI for those with their hats still in the M-XR ring: the full Owner's handbook is available to download and read on the BMW website.
In fact, another thing that did it for me with the M-XR is that there is an overwhelming emphasis on track usage of the bike in terms of the TFT and the handlebar controls (as gleaned from the handbook); this is a minor point, I know, but it felt like half of the bike's functions were going to be irrelevant to me. I may miss that shift-cam engine, though...
I am looking forward to reading here how those of you that end up on M-XRs get on with them.