I get the screen protectors too, just in case. Depending on some games, you really can get quite into it with the touch screen action and not realize how much activity you're doing to it. It's nice when you see the scratches/lines on the protector and realize that none of those are going to be on the actual screen itself. -- Front Line ForceFortress Forever
I usually stick with those from Nintendo for the thing, since they're usually rebadged Hori brand stuff, or someone else that has passed the muster for the duty of it.
the toughest thing though, is trying to get the touch screen perfectly clean beforehand so you don't have little specs of stuff indenting the protector once applied. -- Front Line ForceFortress Forever