I don't think you'll regret buying them. I am Legend is wonderful and frightening. I couldn't put it down because of the haunting atmosphere and the psychological study of Neville (the main character). A pure delight to read. Although I jumped a lot when reading whenever I heard sounds, especially the phone suddenly ringing (my brother phoned me a lot when I read the book, which scared the sh*t out of me every time).
I, Claudius is just hilarious. I love it! It's fun, crazy and downright frightening when I think that things like these actually have happened. Don't hesitate on Rubicon, although it's a non-fiction book it's as hilarious and lovely as I, Claudius. The Romans were a bunch of crazy people! It did not felt like a non-fiction book at all.
About Atonement, have you watched the movie? I watched the movie first and then read the book. Both are lovely. It's a sad story about the consequences of a lie.

Well, they're not all books that hit me emotionally (at least if you don't count the ones who were pure delights to read). Some touches me emotionally and others are pure delights to read.

The way the story was told touched me emotionally. The main character's (the story teller) restrained emotions, the acceptance and even disinterest in changing her situation is very haunting and scary. In the beginning of the story the main character's reminiscence of her childhood seems idyllic, but slowly a creepy feeling starts to seep through the pages and you get the feeling that there's something your not told, something important and horrible. Nothing is as it seems.
That sounds like a great idea!