Definitely get the Pro II (840k)
A very inexpensive way to get into astrophotography.
I started out with the Celestron NexImage but moved on to the ToUcam and can definitely recommend going with the latter, although the NexImage works quite well.
It's a personal preference thing. You will need to attach a 1.25" adaptor so you can slide the ToUcam into your eyepiece holder for prime focus imaging. You can make your own or buy one.
