S4 + Hyundai + Car Dock Question

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http://forums.androidcentral.com – I am about to upgrade to the S4 and I am looking at accessories. I would love to grab a car dock that would allow me to run music, etc from the phone to the car (2013 Elantra). I have read a lot on the iBolt xProDock but wanted to ask (1) would it work and (2) should I get the USB cable version or the aux cable version? I know I can run an iPod with the cable that the dealership gave but not sure what to do with my S4. Thanks! (HowTos)