Well, I have decided I am getting a Nook from Barnes and Nobel's. I like the options this e-reader gives you.
From being able to add more memory, change out the battery, and to lend books to others who have a Nook, I like it all. Plus the system seems more user friendly then the sony readers I have looked at.
I am just going to wait to get it till after exams so that I am not playing with it and not studying, lol.