Thanks, everyone! You've convinced me to hold on and wait for a set of Bilstein B6/HD's to be available. I've already waited a year and am not willing to pay ~$300 more a set to get them now vs my bavarian autosport backorder. I have a feeling they're slowly shipping the US again now.

I did fit a sport package-spec (23.5mm) rear sway bar as well because I had easy access to one. Honestly, I' m not sure I can tell its contribution because I did it at the same time as replacing LCA's and other bushings.

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2012 xDrive35d
2001 BMW X5 3.0i 5MT
and two 1987 Corvettes - Callaway Twin Turbo and Guldstrand Grand Sport 80
Block Tester