Honestly I bought my corbin for the backrest, mostly. The AirHawk cushion handled my butt on the stock seat. But the corbin seat is good enough that I don't have to use any other "enhancements." I've tried gel pads, sheepskin covers and the Airhawk. All were more of a pain for the amount of comfort they added. With my rear pegs shifted forward so I can stand occasionally, I can ride straight through between fill-ups, all day. That's all I can hope for.
So, if you want/need a backrest, find a nice used corbin for cheap.
