Car: 06 A4 2.0T Quattro, non-bose, Symphony w/ Sirius (car didn't come with the Sirius tuner, I installed the factory tuner a year ago).

I just bought a used Eclipse AVN20D unit for a really good price. Things I think I will need:

- The Connects2 (I think that's the brand) rubber mounting kit
- Wiring harness to connect in the decks wiring to the stock harness
- Eclipse Sirius tuner
- Steering wheel controller. I think Connects2 has one of those as well, but I'm not sure which one I will need.

Also, is it possible to use the factory GPS / Sirius antenna in place of the Eclipse one? I don't mind doing some wire splicing if need be.

My wife will be gone for X-mas this year (her family is outside the US, and I can't go with her this year), so I want to make sure it is all installed and perfect for when she returns. I have to have the steering wheel controls and Sirius working PERFECTLY or she will not be happy with it.