I have the 41 with the bull and 7 inch barrel assemblies both. Both are accurate with the 7 being a bit more so due to the longer sight radius.
With the right ammo it will keep 5 shot groups under a dime at 50 feet off bags no problem. Typical groups are .75 inches or less.
I have shot it and the Woodsman quite a bit and would give an edge to the 41 because of its better trigger. Both are good guns, though.
My 41 is about 4 years old. The new ones I have seen seem to be lacking in quality. Mine is comparable to my Dads 41 from the 70s with his being a bit nicer having the extendable front sight(no longer available).
Extra barrel assemblies can be had from s&w or elsewhere (Clark Custom). S&W assemblies will run about $170 or so.
The 41 is a great shooter, but my Walther GSP kicks its tail. Of course it is also more than double the price tag, too.
Anyway, the 41 if a few years old is a great value and excellent shooter.