I prefer the Privacy Screens. It is great having such a large device, but then again comes the fact that everyone can see what you are doing as well as you. Got myself a privacy screen and no more issues with that.
Best Screen Protector I have used is "Best Skin Ever". Not sure what type of polymer it is but the skin is amazing, it seems to almost heal itself when scratched and is very usable with the S-Pin. For a cost of $10.99 I have found nothing better. I always buy the full body protection kit because it is so inexpensive.