No mention of a special collectors/limited edition yet, although I'm sure there will be one. I would expect there will be an announcement by the end of the year.

I can't really offer much advice on where to pre-order, as I've barely ever done so. I've had good experiences with Amazon when I purchase games that are already available, but I have no idea how quickly they ship out brand-new merchandise. A couple of my friends like to pre-order through Gamestop, although my impression is that they can be somewhat hit-or-miss.