Air suspension does make a big difference, the 4.6 on air with 20's rides smoother than the 3.0 on coils with 19's.
But...its only on a side by side though. The coils sprung X still rides well for me (on 19's at least, not tried the 20's on it).
That's quite a start to X-ownership. Jump right in to the deep end!
Hope you get better soon! We are all waiting for updates on this.
