it is a major upgrade imo... the old one looked like a round pig but this one is much more defined and has aggressive lines that flow pretty well. The front is definitely meaner. I think they meshed the RDX & FX designs together. But the rear looks nothing like a Porsche anymore. About the buttons, I think Audi competes with them there. Even though they have their nice MMI system, they would have 2 separate large buttons that 1 toggle could've accomplished.

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'08 X5 3.0si - Alpine White / Saddle Brown interior
Specs: Sport Pkg, Premium Pkg, Tech Pkg, Comfort Access, Aero Kit, Style 433 staggered 20s on Conti DWS
Mods: Carbon 35 tint, LED angel eyes, GP Thunder 7500k fogs, H&R 20mm/25mm spacers, clear reflectors, gunsmoke-tinted taillights
Coded: Digital speedo, windows/sunroof/tailgate close via keyfob

X5 pics at Flickr