These are nice images and are the sort of thing that make me want to invest in a Dob -- just so that I can get decent planetary shots. It's great that you can make out the polar cap on Mars, very impressive.
If you want to check out what is happening on Saturn, just in case you might have captured some sort of weather event or similar, you can check out the weekly archive of images which are sent back from the Cassini–Huygens probe on the NASA website.
http://www.nasa.gov/mission_pages/cassini/main/