Last year at Biketoberfest I rode over to Ulitimate and had them pull off my Mustang seat and install an Ultimate Mid rider seat with backrest. I decided I needed a backrest after the ride down from Connecticut. The Mid rider pushed me so far forward my knees were almost against the Fairing and I was now looking way over my windshield. They make a nice seat but I was soo put off by the seating position I didn't even want to try the King seat. Ultimate did say their seats are set to put you at stock height. Seemed to me I was farther forward and up a bit from stock but I guess I should have also realized I needed to break in the seat maybe...
So when I got back home I bought a Corbin and that sat me just like the Mustang. Lower and back just a bit.
This is all just my take on the position, hope it helps