Good advice from Matt on not spending money at this stage. The 8" Bintel dob is a great beginners scope and the supplied eyepieces work very well with it. You will pretty quickly figure out that the 26mm is the one you will use the most, probably 80% of the time with the 15mm maybe 15% and the 9mm less that 5%. So once you have done a bit of observing, you will be in a good position to decide what EPs you would like to upgrade.
If you are going to buy anything, a decent atlas is the best thing. Sky Atlas 2000 is an excellent choice (see
http://www.bintel.com.au/Accessories...oductview.aspx )
Or a more basic chart is here
http://www.bintel.com.au/Accessories...oductview.aspx
I prefer printed charts to software ones as using an iPad or laptop at the scope is a pain! A red headlamp is also an excellent investment to preserve night vision.
Good luck!
Malcolm