I'll second the new HD Progressives! I installed them on mine and it was night and day difference. Then I felt the jolt in the front so I took it in and had the front forks serviced with regular fork oil and not the heavy duty stuff. The ride is much better and the wife likes it now. Can't do much about the low profile tires so there is still a little stiffness in the ride.
The HD hyd shocks makes the rear end feel easier to handle and faster in reaction , great improvement for me .
But regular fork oil is the one that was in the fork .
Why did you get a better feeling with refilling the same oil ?
My plan was to change to the HD performance fork oil to get a more secure feeling at highspeed-riding ( and hope to loose the swimming of the front ).