OP, if you plan on reading outside at all or on a train/subway/bus with light coming in off windows and reflecting off the iPad screen, you will regret getting an iPad. The glare is unbearable with direct sunlight.
If however you plan on reading indoors, and you really want the other features of the iPad, then get it. However I also read the following on CNET.....
"During our short time with the device, we found the iPad's highly reflective glass screen to be problematic--we were always shifting angles to avoid seeing the reflection of overhead lights. (The iPhone may have the same issue, but it seems less problematic on its smaller screen.) Like many things, this is going to be a personal preference--but we'd give the Kindle (and other E-ink readers) the nod for brightly lit environments, while the iPad wins for darker ones. Meanwhile, if color is a necessity, the iPad wins hands-down."
I have a Nook. I absolutely love it. Keep in mind holding a Nook/Kindle is like holding a paperback while the iPad is more like a hardcover book. The e-ink screen combined with the size of the device makes the Nook my perfect reading device. But like I said, if you really want the other features of the iPad, then you've got a decision to make. I also have no need for color, I just read novels, etc.