I have air spring all around on a 95 Bounder 35' on a Ford F-53. The previous owner swore by them, told me to keep them at about 70 psi and I'd be just fine. His installation was all manual fill and I'm going to leave it at that. I've only had good experiences so far.
A couple of weeks back I was on I-90 westbound coming down to the crossing of the Columbia River. There is a lot of cross wind on the bridge due to the canyon like area the river runs through. I felt pretty slapped around going over the bridge, but the vehicle was totally in control. My awning got the worst of it but the vehicle drove through the cross wind very confidently. I suspect 30 mph winds with gusts up to 50.
I don't think you'll find a factory installation of air springs, but if you are going to do it be sure to research if you want a system that is self inflated with a remote control system or if you just want manual fill. If you choose manual fill you'll have a lot less mechanical stuff to deal with, but you had better have access to an air compressor. If you want the convenience of a remote control system, I hope you are very technically inclined or have a very good mechanic around.
Either way air springs are a huge improvement.