The Revell figures are in soft plastic which I have a hard time dealing with.
There are some wargame figures in 20mm that you might want to check out.
http://www.webspawner.com/users/libmins/liberationminia.html
http://www.shqminiatures.com/Ranges/Gulf/Gulfmain.php?UID=2005101703463467.182.197.241
http://www.warrioronline.demon.co.uk/20mm/20modern.htm