I am happy with power performance of D, and the relative economy I get with it. I used to have 2008 4.8i, thus was a bit more fun, but with 16K I drive per year, it gets expensive... Not to mention I need the range per tank, it helps.

Besides, 5.0 with same options gets in 80K+, there are no eco credits etc... So the lease would cost me $200+ more per/mo.

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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