Originally Posted by Europa
His might have a USB plug coming out from the back of the head unit, but I'm not sure.
I got a Sony head unit with a USB input a few months ago at Best Buy. I love how it charges it as it plays. It doesn't have built in bluetooth, so I was using the speaker phone on the iPhone for calls, but that wasn't loud enough (had to turn the AC off and roll the windows up and it was still kind of quite) so I got a bluetooth speaker phone which is very loud and works very nice with the iPhone 3G and 3GS and the Sony Head unit.
Here's a pic of mine.
My perfect head unit would be a combination of yours and the OP's. I want the flexibility to switch between a USB port and Bluetooth. And, yes, the USB port is quite handy for charging.
I'll keep shopping around...