Any disposable razor with two or more blades will do a fine job without too many nicks. I've noticed it's really hard to gouge out chunks of skin with multiple-blade razors, while it's still possible with the single blade ones (as if you can even FIND single blade razors). I got a free sample of a razor with 4 blades not long ago.

It's getting ridiculous (it actually was pretty useless...I think so many blades forces the whole thing into an angle that doesn't actually cut anything anymore...but you certainly won't nick your skin with one of those).