John, it depends on what you already have set up. I wouldn't worry about the DVE or Avia right now if you are happy with your picture quality. Once you get your speakers and sub if you have any questions about the setup you will get plenty of help from the forum. I'm not familiar with what your receiver can do, but if it has an auto setup mode, that will get you going in the right direction once your speakers and sub are connected.
A computer once beat me at chess, but it was no match for me at kick boxing.