well I can't recommend a good case because mine also isn't very good. As for invisible shield, I don't recommend getting one. It is expensive plus it makes the touch screen harder to use because it isn't smooth like glass. It sorta feels rubbery in a way when you touch it. Try looking for a Vikuiti screen protector for your surround. I don't think there is one yet but when it comes to screen protectors, Vikuiti by 3M is the best I have seen.