Very good decision! I currently have three fully functioning readers...have had a Sony 505 for two and a half years, a BN nook for about three months and a Sony 650 for two weeks. And if I found a Sony 300 at Target for less than $50 I'd pick it up in a heart beat!
Right now, I currently have a 350 that I'm setting up to give to my Mother In Law. If she doesn't like it (highly unlikely) that'll be mine too!