FWIW, I'm using an 800 screen protector on mine that I trimmed by just a hair. It wasn't that hard... Just don't try to trim it drunk or after lots of coffee and you should be fine. Also you only really need to trim in on one of the short sides - the long sides will still be a hair too big but you can slide it under the case and all is well

For brands, I recommend Brando. I've been using them on my Palms for years, and they are by far the best quality for the price.