..Unless in the next 5 years some press article or two document the fact that it's crap, OR/AND a new piece of technology that is vastly superior comes along and makes it even more obsolete than it is. How likely is that to be ? remember satnavs 5 years ago? 
Quite frankly, anyone with enough discernement and a small notion of techyness (and a smartphone handy) will realize that google nav is /vastly/ superior to the onboard pretty quickly, and that before buying a car.
The same could be said for the auto transmission. 9 out of 10 of X3s are sold with an auto transmission, therefore I should also get it, and feel like a lazy ass for the next 4 years "just so i can resell it better" ?
Personally, given your statement, I would hunt for the one /without/ the nav, and /without/ the auto transmission and I'd probably be willing to pay more second hand to get that one!

Quite frankly, anyone with enough discernement and a small notion of techyness (and a smartphone handy) will realize that google nav is /vastly/ superior to the onboard pretty quickly, and that before buying a car.
The same could be said for the auto transmission. 9 out of 10 of X3s are sold with an auto transmission, therefore I should also get it, and feel like a lazy ass for the next 4 years "just so i can resell it better" ?
Personally, given your statement, I would hunt for the one /without/ the nav, and /without/ the auto transmission and I'd probably be willing to pay more second hand to get that one!