I know it's a little early, but does anyone know how much a head unit for an 07 Sti limited would cost. I want something OEM that fits, but has an aux input. Also, would there be any great difference in how the unit wires in? Any info would be appreciated

 

I would think any stereo shop could put an aux jack in the center stash box like the '07?

 

A few have gone this route and report good quality, if your only goal is to get an AUX input into your '06:

http://www.jazzyengineering.com/

Personally, it seems like a somewhat hack job to me, cheap solution.

I'd like to see how much a 2007 LM HU would cost, seems like a really clean way to retain everything factory and get the Aux input as well.