OEM Automobile Systems - How do you rate them?

I am sure that everyone is aware of some of the brand-name audio systems that are coming in new cars these days. I am interested to see how your trained ears rate of the OEM systems out there...that you have heard. Here are some examples of Auto manufacturers and the brand name audio system they use:

Lexus: Mark Levinson (My favorite)
Porsche, Nissan, Infiniti, Audi, Chevy, etc: Bose
Chrysler: Infinity and Boston Acoustics
Mercedes: Used to be Bose, now Harman Kardon
BMW: Harman Kardon
Toyota: JBL

I also know that there are some Alpine OEM systems out there but can't remember offhand who (Ferrari?)

I don't want to turn this into a cost vs quality comparison as I think we all know that you can take the money you would put into purchasing an OEM brand name system and put a lot nicer audio system into your car. I just want to hear your opinions on the OEM systems for what problems still linger (Bose, etc).