Just put 444s on about two weeks ago; have the setting set in the middle with HD springs.
It is hard to tell just how much of an effect that have on my bike's improved handling, because I did them simultaneously with Progressive monotube cartridges in the forks and new Michelin CEII tires, but overall my bike is a compleley different beast from what it was with the stock set-up.
My wife has nerve damage in her arm and is very sensittive to rough riding, and she liked riding on this new set-up better than the old (when I would vary the air pressure in the stock shocks between 30 and 50 lbs. it didn't seem to matter as the ride was never smooth enough for her.)
Black Sabbath, Red 100s, and my bike belting out 4000 RPM. And making my wife squeal. These are a few of my favorite things....