mean city cycles did a great job on my deluxe seat. prior to mods, about 30 min and my tailbone was killing me. now 2 hours and all is fine. actually moved me back about just over an inch, too. great service and communication. well worth it if you want to keep the seat looking as stock as possible too.
I agree about the Mustang seats.... Had one on my first bike (Honda Shadow Aero) and loved it. Longest trip I took was only 6 hours in 1 day a few times, but I never got sore.