The first time I tried a Hobie,(aside from having trouble seeing through my mask)
I was left wondering how these guys do it, as my back was killing me after. The Pac Angler is the tallest seat on the market and also wraps around you, so your lower back is not stressed. It does not slide around if properly adjusted and tightened. My current favorite.
http://www.kayakfishingsupplies.com/...er-Seat/Detail