I'm very unimpressed with these new models, but I admit we don't know a whole lot about them. Maybe they have proper folder support now.
The thing that worries me a bit is what will become of my beloved 505 reader? I'm actually just about to order a very expensive cover for it to better protect it and as a fun gift to myself, however what if my 505 gives up the ghost on me soon? It shouldn't, but if it does die does it mean I'll have to either hope for good luck on ebay to find another 505 or have to consider one of the new Sony models that so far don't impress? Bah. "What ifs"