Go for it man, ff you don't need the room/snow capabilities then why not! I love the M5 in general. The E39 was one of my dreamcars when I was a kid, so I may be a bit biased! I hear they're the best in terms of driver involvement, kinda bummed the next gen M5 won't have a manual anymore (which I still think will continue to be fantastic cars). Best way is to go drive a few!

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2008 X5 4.8i, Space Gray/Black!