The 631 shipped with finger groove combat stocks, the 631 Lady Smith with smooth rosewood grips, and the 632 with Uncle Mike's 3 finger rubber combat grips.
These were produced for only a couple of years in the early 90's, so they are fairly scarce. Most of the ones I've seen lately have been priced sky high, a 2" 631 LNIB recently sold on GB for $1050, and there is a 4" 631 LNIB listed right now for $1200 BIN. Of course, there are always exceptions, as I have less than $500 each in mine, and another forum member recently posted about finding a 632 for less than $300.
Recoil is very manageable using factory .32 magnum ammo, and you also have the option of firing .32 long ammo for practice purposes. I believe one of these guns, loaded with .32 long wadcutters, is the perfect way to learn how to shoot a J frame revolver.