Despite placing an order for a new x5 4.4 sport I'm considering bumping this to an X5 4.8is which means I would get to keep my 4.6is for another year. That's got me thinking about upgrading the suspension, which is one of the few areas I've not been entirely happy with on my present car.
Does anyone have any experience/knowledge of uprated dampers/springs/rollbars on an X5 particularly conisdering that mine has the rear air-suspension. I believe AC Schnitzer do something as does Eibach but can't find any unbiaised reviews or illustrative prices.
I'm based in the UK.