Had an E53 w/ sport suspension, then 2010 X5///M, now 2013 X5 50i with Adaptive.

The ///M reminded me of the E53 sport - which is to say - harsh.

The Adaptive Drive equipped 50i is light years ahead re comfort.



ps.. I ride year round on 20" RFT's (Scorpions in winter). No complaints.

pss.. My X5 was in recently for service. My loaner was a 35i, sport suspension (not AD) and was on 19"s. Ride was much firmer than mine.

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Go 50i or go home