After several posts and obsessing about it I finally went with the HD Tall Boy seat for my 2015 ultra limited low. It raises me up about an inch and pushes me back from the tank an 1 3/4. I rode the demo of the seat for about $50 miles and decided that for the money ($349) and the comfort it was the best way for me to go. I looked at the Mustang and Corbin seats as well as the HD Hammock. The Hammock I tried out and did not like the hardness of it and the seating position wasn't far enough back for what I wanted. Since I couldn't try the Corbin and Mustang seats I decided against them for the price.
The Tall Boy gives the bike a whole new feel. It is amazing what seating position will do to change the feel of the ride. Now I just need a backrest and I think I will be really comfortable.

 

Glad you found one that fits you. It sure makes a difference.

 

SCGamecock, how tall are you? What size inseam do you wear in pants? I'm contemplating the tall boy because when I force myself back in my seat, my shoulders get much, much more comfortable. The added leg room (in addition to the forward controls) is just gravy that would be welcome. I'm not particularly tall myself and wonder what other riders my size think of the tall boy seat. TIA.