I've done some of those also (not today but when the kindle 3 showed up).
But, I've found that those reviews did not help me much, the image of the displays (at least those I've found) are ot that good to give a real feeling of both. Later I'll try finding more.
I know a guy that has both Kindle (not sure if Kindle 1 or 2) and Kindle 3. He said that Kindle 3 has a display that, in his words, is a little better but older kidle already had a display that was good enought. Still waiting for his answer for my question on how much better one is when compared to the other...