Oh man, I just typed up a long summary of my first few weeks' experience with my PW2 but the internet ate it
Safe to say, I'm incredibly happy with my experience with the PW2, and don't regret not paying extra for the Aura HD at all - the slightly better screen was not worth the trade-off (for me) in terms of size, interface, and price, among other things. In fact, I can't stop reading on my PW long enough to deal with my neverending paper book stack!