Thanks Foomph. Funny, but my brother got these cross bars on his E53. They dont sell them here in US (he got his off the ebay).

Yes, they are very nice low profile, and quite, but I am convinced they are not strong enough for my needs. Thule and BMW OEM have much sturdier profile.

But thanks for the suggestion anyway !

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His : 2013 X5 3.5d Deep Sea Blue/Black/Aluminum with ALL packages, 20" 214"s, running boards, Adaptive Drive, Spare Tire, BMW Apps
On Order : 2016 X3 3.5 MSport Silver/Mocha with DHP, CW, Prem, Tech, DA, Lighting

Hers : 2015 328xi MSport Silver/Red

Prior:
2008 X5 4.8
2011 X5 3.5d
2010 335 xDrive
2013 335 xDrive