I strongly suggest getting a Smart Cover (or similar) and not bothering with a screen protector. Unless you have absurdly sharp and long fingernails, it's extremely unlikely that you'll scratch the screen during normal use. While you're not using it, the Smart Cover provides an elegant and practical form of protection for the glass, while also serving as a handy stand.
Screen protectors, no matter what people may claim, reduce the clarity of the display and negate the oleophobic (anti-fingerprint) coating to a certain degree. If you're careful while using your iPad and use a Smart Cover when not using it, the chances of the display being scratched or damaged are extremely low.