Actually, I know a guy who installed an air ride suspension on his truck and he loves it, he said that it was the smoothest ride he's ever had ( almost Cadillac quality, and if you've ever driven a Caddy you'll know what I mean).
So I think that it would be a good idea for you to do this kind of mod... but are you racing you ride at all (slalomm, auto-x?) if your are or want to think about doing some more home work on the kit before you do! Other wise I would say do it should be worth a grand in the long run!
