I have a 2006 LC. I'm looking at purchasing either the USASpec BT35-TOY or the Vais iPhone integration kit. I don't need to install the mic for handsfree calling of course. My LC does have the factory navigation with factory BT handsfree calling. Purchasing for the ability to play music from my iPhone. Ive seen numerous posts on the options out there, but do you guys have any preference between the two?