I Do Not Have A Ereader but have been Doing
A LOT Of Research.
Here is a review site that I have read all the way through. I am leaning to the PRS 650.
My reasoning is. With holding 1200 books no matter where I Down loaded them from why do I need WIFI ?
Here it is. Check it out it may help if you have not made your decission yet.
http://blog.the-ebook-reader.com/category/reviews/