I got the Airhawk Cruiser R for the wife and she really likes it. On the touring bike seats, it fits either front or rear perfectly. Feels like you're sitting on a squishy pile of thick mud when it's inflated just right...and it's not a permanent attachment like some of the others out there.
So far, the HD Hammock seat on my '11 SERGU is fine for me, but only time will tell. If/when it wears out, a Corbin will take it's place for sure...they feel hard to the touch, but it's the best long haul seat I've ever sat on, plus they look good on the bike. They ain't cheap though...