Welcome,
8" dob is a great scope, easy to use and very good light gathering. Saxon, Skywatcher and several other brands are pretty much the same scopes, all made in the same factory, just with slightly different accessories and paint jobs. Don't get carried away with accessories or eyepieces just yet, get used to your scope and become familiar with it, before spending any further. But when you do, consider a planisphere, a telrad, and stellarium from
http://www.stellarium.org/
Planishpere to get you started on finding your way around the sky.
A telrad to help find what you looking for - really quite essential on a dob.
Stellarium, free planetarium software, arguably the best for the price.
And last of all - clear skies
Rod
