Agreeing with the newer cars being plastic and older ones being easier for systems.
I guess I was lucky with the 2010 HHR. The adapter kit was $90 something at the time. The stock unit seems good enough though. It has 3.5mm on the front and doesn't really clip the stock mids (which are the only thing powered by the doors) until really high up...and even then, I don't care about blowing them cause they are stock garbage and the bass on the head unit is typically all the way down (gain on sub amp pretty high + pac LC1 to level it out)
The scoche converter thing made something stop working. I can't remember what. It was one of the functions on the steering wheel/readout near the gauges.
I think that if your stock unit needs to be in there, but doesn't need to be used for the computers functions, just wire it to the back or hide it somewhere, then just wire everything up from an aftermarket unit.
And yeah, they make the new cars so you have to take it to a dealership and have them work on it and they will get a fortune.
Looks like they are trying to get more money from car audio enthusiasts this way.
Although I wouldn't really touch newer cars systems anyway. Too nice to even attempt it. I was hesitant on my 2010 HHR, but luckily it's easy enough and everything can be put back to stock (went through 3 aftermarket units, 2 single din's and one double din)
As far as CD's, and not being able to find songs on the ipod: I never use CD's. Only when a 3.5mm cord is broken and I can't use my ipod.
I have over - itunes is being a *****, but I've got more than 400 songs and I can easily find them all - you know you can browse by song title? At least with the ipod touch 4th gen it's super easy.
The new feature they have allows you to drag and drop files right into itunes from anywhere. You can create playlists which make it easy also. I've got one for decaf, one for most recent songs, one for electronic, etc, etc.......