hey guys, im lookin to upgrade the head unit in my 2008 A4. i have the basic symphony radio and want to add some new features. i just wanted to know what you guys have and like in your audi. im lookin to keep it under $400 but want the adapter for steering wheel controls, bluetooth music and calls, and some phone app controls since i use my phone for music. satellite, HD, and GPS are not necessary but would be cool
thanks in advance