I used the High Road Hedbed last time and like it quite a bit. It's smaller than the traditional shaped ones but still provide good support. You can inflate more for side lean or less for even. The extra bonus is since it's not as "in your face" as others, I can comfortablely wear my big noise cancelling cans while using it.
http://www.ebags.com/high_road/hedbe...?modelid=86540