I just bought this case:
https://www.amazon.com/gp/product/B005NCO35S/ and I'm really happy with it. (It is the Sony case.) I was worried about the stylus, but I can clip on the inside at the spine, and the cover closes perfectly.
I'm not a bend-the-cover-back reader, so I can't speak to that.
I like that the reader clips in snuggly, instead of having to slide it into some sort of holder, but that is my personal preference and something I specifically seek out for my covers.