Not that I want to join in on the aluminum debate, but I was pretty sure the 350 are aluminum too, but....I didn't do the test at Best Buy.
In any case, I've now looked at it twice, and I'm thinking I just might get one. I really liked them--may or may not be true, but it feels sturdier than the Nook (which was my big contender) and I liked the size and the price. I'm still mulling it over, but is definitely in the running for me.