The filter you linked to is a 52mm filter so having one would depend on the lens. Personally, although I have a couple of ND filters they fit four of my Hasselblad lenses, I don't use them very often. B+W has seven ND filters with densities from 0,3 to 6,0 with a range of 1 to 20 stops. Stacking polarizers as mentioned might cause vignetting as well as the other issues mentioned.

http://www.jeffreyglasser.com/