Hi, I have my PRS-300 for two weeks now and today my new case arrive (bought after asking for advice here). Is the Tuff-Luv Napa Leather case cover. I really like it, it's smart and ligth and the reader fits tight. You can fold it like a notebook (I like to use my readers with one hand too) and if it's important for you the "stand" feature this one will do the trick.
http://www.amazon.com/Tuff-Luv-Leath...=pd_ys_iyr_img
The fact that I have used the reader "naked" in the last two weeks, means that now it seems strange to have it partially covered (I love it's design), but I feel safer having it protected all the time (when reading or transporting).