What are my options to get some kind of adapter installed for A2DP stereo bluetooth (music streaming from android phone) for the stock pioneer unit (with factory ipod adapter installed)? Btw, I have a Scion Tc 2006.

How difficult would the installation be?

If I had to replace the whole stereo system, what would my best option be (CD, Ipod and bluetooth compatible unit that can still be controlled from the steering wheel controls)?

Thanks for the help