Love paper books - but really don't like lugging them around - especially since I'm almost always reading more than 1 concurrently. The original kindles have a very nice interface - the display almost looks like paper.

I have downloaded 5 books to my wife's kindle - and haven't used a single GB yet of the available memory. Even if I did get low on space, I just got an account at www.box.com . They have 5GB free, but for a limited time, new people are getting 50GB free for life. Of course, I need a wi-fi connection to make use of it, but wi-fi is becoming ubiquitous.