Kindle, Nook, and other E-Readers

I'm planning on buying one of these e-reader gadgets.  I'm a die hard book person and I love my personal library of books.  But when I'm working out on my elliptical, I have to read to survive the 20 minutes.  I've tried TV...and it drags on.  I've tried just focusing on the exercise...that's worse.  But when I read, it's heavenly!  The time flies by and before I know it, I'm done!  But try reading a book while walking on an elliptical.  I bought the elliptical because it had a great book rack.  Well maybe I bought it for other reasons, too.  However, the book rack was a big selling point.  No matter, I strain to see the words.  I thought a Kindle or something perched on the book rack, bright, with large font, would simplify the reading...and thus speed along the exercise. 

I'm looking to my blog friends to see which product is their favorite.  Besides checking with my friends, I'll do a little on-line research.  It's a big thing, moving away from books.  I always keep my favorite books to add to my shelves and sell back the not-so-favorite at the 1/2 price bookstore.  So, if I like an e-book, do I go buy the hard version?  How do book people do this????  I will not give up my library.  Do those e-book covers, look like books?  Feel like books?  Do you put those in your library?  This is my dilemma.  I will keep you posted on how it pans out.