I don't have any personal experience, but all I can say is find someone who DOES. Something like airbag suspension can be very damaging, or indeed, dangerous if the components aren't of the highest quality... But I also know this sorta suspension has been around for a long time, so there are probably a handful of companies that have it down. I would go to shows and ask everyone for their input. I would also find another forum (I doubt anyone on HAN even has airbag suspension) to ask your questions on... maybe SHO or something? :dunno:
:edit: fogot to mention... if you're considering this as a performance enhancement, rather than a style one, forget it. Performance-wise, airbag suspensions blow ass (with *very* few exceptions).