I have This one and like it.

 

I bought the Acase screen from Amazon. It was $9.55 and works great. I would do a linky thing like kelmar but my internet-fu is weak.

 

I bought the XO one because it got great reviews. However I haven't put it on yet because it's a wet application (no way I'd try anything else on something this big) and you're supposed to let it set 24 hours, and I don't wanna be without my tab that long.

 

I haven't bought one for the SGT yet, but I like the Martin Fields ones.

Martin Fields Screen Protector Twin Pack - Galaxy Tab 10.1

 

I've always used Clarivue's anti glare. Samsung Galaxy Tab 10.1 Screen Protector from Clarivue.

I like the matte feel to the screen protector because the touch response is so much easier. With the clear screen protectors, it seems my finger sometimes gets stuck.

 

One word. Steinheil

 

I bought an SGP Ultra Optics one a few days ago and am waiting for it to arrive soon. Will report when I get it.

 

I have the Ultra Crystal. Love it.