I have to disagree with the comments about the Gen3 being "cheap looking"; I don't find it to be so at all. Yes, the case is made out of plastic, just like the case of virtually every other electronic device that I own. There's absolutely nothing wrong with modern plastics as a constructional material - to equate plastic with "cheapness" is, IMHO, not right.
As a former Sony owner, I think personally that the Gen3 is MUCH better in all sorts of ways. Very well worth the extra cost compared with the Sony.