E-Reader Suggestions?

Okay … so I want to make the jump to the e-reader. But I’m stumped as to which one to buy. Kindle – Nook – Sony? I’m kind of leaning towards either the Kindle or the Sony. I like the fact that the Sony would be more flexible for other sources of ebooks. But I also like to one-stop shopping of the Kindle and Nook. The prices seem to be cheaper on Amazon than Barnes and Noble. But the books on that can go on the Sony are even cheaper. Price isn’t really an issue for me right now – this will be my large Christmas gift from my grandmother. I really want something easy to use. So let’s start a discussion, pros/cons of the different e-readers. Ready? Go!