I was mostly considering the Kindle and the Nook because of price, content, and proliferation. Kindle because of amazon store (with cheaper books) and Nook because I am a B&N member and just love B&N. I really don't know enough about the Sony's but I am willing to investigate.
Perhaps you are right in that if I can hold out a little longer I can get feedback from people that get a Nook.
I just don't want it to take a year like I waited for my new phone... First I was waiting for the Treo 800W to come out, then the Treo Pro was announced. Just as the Pro arrived, the Pre was announced as CES. So then I waited until summer to get what I really wanted, a Pre.
I don't want to spend another year! No patience!