Title says it all really. I use it at work for email and web, at home for reading on the sofa and in bed, so it has to be portable. 10" tablets aren't really as portable as i'd like. 3G is nice, but not a must have.
I like my iPod, but it's 2G and getting a bit old and slow, and i'd like a bigger screen. All I really need is a decent mail client, rss reader, and web browser. Games are a bonus. If it can be a phone, that might be nice, but it's not necessary.