Perhaps this one.
http://twelvesouth.com/products/hirise_iphone/
PS: You do know there is an accessories section on MacRumor
https://forums.macrumors.com/forums/108/
I have this and was going to recommend this, however, OP mentioned about wanting a dock that would have the capability of playing music - line level output, I'm assuming.
Also, this dock can use the original Lightning cable from Apple, so no issues with compatibility there.
I have this and was going to recommend this, however, OP mentioned about wanting a dock that would have the capability of playing music - line level output, I'm assuming.
Also, this dock can use the original Lightning cable from Apple, so no issues with compatibility there.
Since the TwelveSouth leaves access to the iPhone's headphone port unimpeded, surely you could just use that?
Doesn't give the nice look while docked if it has a 3.5mm jack plugged in, waste of money the 12 south.