I used to have the hesitation issue on the 3.0 but it is no longer there and I did nothing in particular to fix it - break-in thing perhaps? 4.8s have the jerky transmission, so I guess you pick your poison at this point. As I said in another thread, I would never pay nearly new prices for a used vehicle. It doesn't even seem like buying new takes much of a hit when you throw these prices on the table. Keep in mind the recession affects new cars more than used... probably why the used prices are still high, so similar, and not as negotiable. Anyway, if you don't plan on keeping it long, go with the CPO.

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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