how much would it cost to upgrade to a DHX air 5.0? i'd like to keep the coil shock, do you think i could get a DHX air upgrade from my LBS? also should i upgrade to a DHX air if i mainly ride trials, and lots of tech DH during summer, like 1-2 times a week, also some light freeride and dj, more like all around? is it worth the DHX air worth the upgrade, and do you think i could keep the coil and get the DHX air at a discount for maybe 300? or should i just give up the 5th COIL and get the DHX air?