I have an older Kindle, but I've wound up doing all my reading on my iPad. It's so much more versatile. Yeah, the Kindle is lighter and easier to hold, but when I'm away from home I only want to be hauling around one device, and the iPad (plus Bluetooth keyboard) replaces both reader and laptop.

And, depending on your library, you might be able to browse the new e-book acquisitions just as you'd browse the print editions.