I have the yellows on my 2005 4.4i sport suspension model w/rear air suspension. Vegas roads aren't that bad, so use that in your decision making process. I like them and have them on all four corners. Sporty ride and responsive handling, but sharp bumps will be more abrupt than with stock shocks.

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Kirk
Las Vegas
2016 X5 40e Mineral White/Black Dakota Leather, ZLL, ZCW, ZDA, ZDB, ZPP, multi contour seats, rear side window shades, HK stereo
2011 E90M3, 6-speed manual