Thanks, Johnny.
It's still in transit. The earliest delivery date is Friday (next week), so it will probably arrive the week after.
It can be used with both telescopes.
I have seen really good images taken with the Neximage 5 and the Astromaster 90AZ (and even the 70AZ), but also nice videos taken with the Neximage and our dob (when I first heard about the Neximage I found some YouTube videos). I even found a video of Uranus taken with the Neximage and our dob. Tiny.... but it was there!