I recently purchased a Sony PRS-350 for my wife. It is her first eReader and so far she loves it!
After looking at the Kindle and Nook (as well as my Aluratek Libre) she decided that the 5 inch screen of the PRS-350 was perfect for her. She didn't want/need wi-fi or extra storage. The 1.4 gig of internal memory seems to be more than enough.
I did a video review of the reader for my blog/YouTube channel. I hope everyone finds this helpful as they go through the decision making process.
Sony PRS-350 Video Review