My personal rule is never to buy electronics until you really want them, but as soon as you really want them, you should buy them. They are always evolving, so the waiting game is generally a lose/lose. I am still thrilled with my K1. Yes, it would be nice to have 16 shades of grey, and I know I will upgrade someday, but for now, I am just having fun reading more books than I have in years.
Just have fun, have fun, have fun.... You will love it, love it, love it....
k4k