Tracking with a dob is easy as Erik has already mentioned. An 8-10" is a great workhorse size and would leave you enough for a few considered purchases to go with the new toy.
Top of my list would be:
[ul]
[li]Cheshire eyepiece to get it collimated correctly
[li]Telrad to allow easy pointing to objects
[li]Planisphere to learn the sky and to help locate objects
[li]Red torch to preserve night vision
[li]Copy of Sky and Telescope for ideas and tours
[/ul]
Notice I didn't say anything about better eyepieces. They can come later when you have more experience, until then the ones the scope came with will be more than adequate. These are expensive and you need to make good choices that are yours and related to your viewing habits, otherwise you end up with lots of expensive paperweights.
Welcome to the hobby/madness
