I just got my '07 ST and have bought a new seat pad in prep for a trip in May (Houston to Colorado and back). At the advice of a friend, I've bought an "AirHawk" pad which is supposedly designed from the medical industry. I work overseas, so haven't seen or used it yet, but I'm looking forward to trying it out. I did considerable research and it seemed to be the most highly praised (I'm sure there are differing views), due to it's adjustablity (you inflate it, then deflate to fit your rear, etc.) and the fact that it doesn't raise you that much off the seat. You might check it out....obviously, I can't swear it'll work, but based on research I did, it seems to best for me.