Turns out I was wrong about PRS+ not being ported to the 600. According to the website's main page, they tested the software on the 300 but pulled it quickly because of a battery drain problem. However, in
this change log they say that betas for the 300 and 600 should be out in a few weeks (this was written just a few days ago) so maybe I'll get that problem fixed after all once the new software is available. I sure hope so. I really don't want to do deal with yet another device. I already have an iPhone a netbook and an ereader. I really don't feel any need for a tablet as well.