C90 was my first scope and it's a fantastic introduction to astro-imaging. Nice, pic, looking forward to seeing your journey through the universe in photos!
Very nice! Small telescope? You can get hobby-grade 8-10" dobsonian or newtonian telescopes for relatively cheap -- probably cheaper than your camera haha. For the moon, you can start getting cool things like mountain ranges, and long shadows in craters and such. It really starts to look like a world, and not a ball. :)