Glad you posted this question. I put on a badlander seat on my deuce, and it does offer more back support and sits a little lower than the stock seat. But it could stand to have a more softer or forgiving cushion for my butt.
It seems you hear more about Mustangs and Corbins, but they are pricey. I've seen a couple of Deuces with Mustangs, and either they didn't keep them up, or the leather just didn't wear very well. I believe the Leperas have gel in them, or as an option. Hopefully somebody will post pics.