I also changed the shocks to progressive 412's and the ride quaility is about 600% better than stock. As the temp here was only about 0, my ride was somewhat short, but in the 2 miles or so that I rode, I can tell you that the shocks now have effective damping, and the progressive fork springs got rid of all the sag in the front end yeilding a ride quality that is great! As a side note, the progressive 412 is available in black and really looks good as well.
If you choose to go this route, and will be doing the installation yourself, watch out for the sharp edges on the stock H-D spacer at the top of the forks. It's sharp enough to remove a finger if you are not careful. I used welders gloves when removing the top cover off the forks and had no issues.