I would definetly stay away from air unless you make regular trips to HD to pick up (25) 50# bags of Sacrete or have an awful driveway to contend with and it will eat tires in "low" as the alignment changes from setting to setting, and it sits .5 - .55" lower in "standard" than coils. Coils give a more "connected" road feel IMO. (i soo wish it wasn't required for a jan '13 delivery)
My son says there is a difinite stiffer ride when sitting in the back of a loaner with springs. Twice I had to drive on dirt roads and raised the suspension to the max. I also am able to adjust the height making it easier for the in-law to get in and out. I've also had to raise the car when going in and out of a couple of steep drives.
True, but as in every other car, so will taking it at an angle so one wheel hits the curb before the other.I would say NO, it is not economically feasible to upgrade post delivery. Beside ride comfort and efficiency what you need to consider is road condition and driveway slope. If your driveway or places you visit has a steep slope, keep in mind that the break-over angle of MS is only 11 degrees. In those condition, air suspension will come to the rescue.
I have coils. Finally got a P85+ loaner the other day which I think was the first car I've driven with air since buying mine. The ride was less harsh despite the more sport tuned "+" suspension... I liked it better, but honestly can't tell you if I liked the "+" part of the ride or the air better... I'd lean more towards the + than the air... Having said that it was kinda cool to drop to low on the interstate because it feels a little tighter low like that... and the car felt less "harsh" over speed bumps, for example... but overall prob not worth the money or the risk of breakage... esp after 50k miles ;-)Thanks so much for all the feedback everyone. Now I can sleep tonight.