Thank you very much guys, you have clarified quite a few things and made my decision much easier. Get a dob now

and save up for a mount.
As Dave summarised it nicely, my budget does not allow me to do any serious imaging (yet).
Another question, I was not aware that (H)EQ5 or EQ6 would take an 8" dob. Is the limitation just the weight?
The reason I am asking is that EQ5 can take 10kg and the 8" dob that I was looking at is 9.4kg. I know that this is close but EQ5 is almost half the price of HEQ5 which means that I could get the money for it in half the time.