I had my rear camber set to the limit of the spec while still maintaining a bit of negative camber.

I am also looking at the Conti's, but for my wife's E46M3 as a likely move to colder climates is looming.

I'd look at the Toyo all seasons too if thye have the right sizes.

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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