To many netbook

Hi all, I'm looking to purchase a netbook for my daughter in the next week or 2 and I'm getting more and more confused. I was hoping you guys could help me out. I'm going with the net book because of the size, she need a small one and the netbook are the smallest I can find, it will be used for checking email, face book, and typing her home work, or writing, stories, and poems. the price is just as confusing as the models. They seem to be just about the same specks, 1.6 atom 1gig of mem, 160 hd, so I guess I'm looking for one that is the most durable, and reliability . I have noticed the outside demotion seem to be the same size weather it is a 8.9, 10, 10.1, 11 screen. feel free to ask me any question if I didn't explain it enough here, I guess I'm more concerned with the size and reliability than price, the smaller the better.