The problems with oem navigation that i see are that there would be less space for ipad internals, its expensive, buttons would be useless, and you'll have to reach way out there.
I am aiming for genesis coupe's look
http://media.bestofmicro.com/2013-hy...-349846-22.jpg, frame like that would be perfect.
For steering wheel control you can either keep the stock head unit or
Steering wheel control with Pioneer? because ipad is hooked up to the headunit. I personally dont need it I control music through my pebble watch.
And i am waiting on jailbreak for the new ipad to come out, because without jailbreak you will lose a lot of features. For example right now my ipad unlocks when i turn on the car and locks when power is lost.