I've been mulling over a suspension upgrade for my 08 Night Train. I've been tossing up between the 2 and here's what I've come up with: Progressive 422's -Definite ride improvement -cost effective $500 -more reliable -adjustable Legend L2 Air suspension -Best ride improvement -much more expensive $1200 -Less reliable (an airbag leak on the road would cripple!!) -Adjustable I have intentions of taking about 3 long trips next season (7k miles total), so thats' why I'm considering the upgrade. I guess my main question is, Is the air suspension upgrade worth it or is it a waste of money? Anyone have any experience with either?