If price doesn't matter, mind as well give the Cayenne a try as you've already had the X5. I realize, in comparison to the 4.8, the M is much faster and all but its still a lot of the same car. I think the Turbo is fantastic looking and would have jumped at it if I could have afforded it. Love that the brand is a little more exclusive and you just don't see as many on the streets.

I drove the cross shopped the Cayenne S and thought the X5 50i was all around nicer.

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12 X5 50i Sport
06 Porsche Boxster S
08 X5 4.8i Sport (Sold)
06 Range Rover Sport SC (Sold)
03 330i Performance (Sold)
01 330ic (Sold)