I would say avoid the SGP anti-glare (they called it anti-fingerprint) screen protector... at least for now.
I had used their anti-glare protector for my iPod touch that I really liked. So I ordered the one for iPad immediately right after I got my iPad. It arrived yesterday, but the thing is very disappointing. The problem has to do with how they cut the hole for the home button. Instead of having an O-shaped cut out, they have an inverted U-shaped cut out, leaving the area below the home button uncovered. Not only does it look ugly, it is also quite impractical, since you are very likely to unintentionally touch the area below the home button every time you press it.
It is very puzzling why they cut it this way for the iPad, since their iPod touch version was cut perfectly (O-shaped cut out for home button). I've emailed them to see if they can do properly cut version or refund, but they haven't get back to me yet.
Another brand that got mentioned frequently for their quality screen protector is PhotoDon. But you can forget about this too. I've asked them regarding how they cut the screen protector for the home button, this is their response: