If the '17 is Nav equipped, it will also have XM capabilities.
As mentioned before, the Aux can either be the stereo input in the left pocket like your '07 or the USB input in the trunk for MP3's or an Ipod / Iphone with music on it. Headsets are the same.
I also noticed that because the radio unit has moved from the shelter to the trunk, when there is a cell phone in the trunk I will occasionally get a lot of static interference. Moving the phone further from the radio tends to resolve this issue.
These were the only things I noticed in terms of audio in moving from an '08 to a '14.