I have the "basic" cheapest version of the Kindle and I wouldn't give it up. I read a lot and found I was running out of shelves for "real books". I don't plan to upgrade; I'm afraid I'd spend too much time on the internet. I just like to read books on mine or play some of the free games.
Here's a great site to get free Kindle books (someone on here posted it before). They send you an email each day with 6-10 free books that you then order from Kindle store on your Kindle.
www.pixelofink.com