Gorilla Glass can scratch, my wife's Note already has a few small scratches on the screen from not using a screen protector. I have the Steinheil Glas.t screen protector that you were talking about. It's by far the best screen protector I've owned yet.
It's extremely easy to install, doesn't lower screen clarity, or cause trouble with the S-pen. It may seem expensive for $40, but you will be much happier in the long run.