Hey,

I would personally replace the headunit and make sure whatever unit you get has the inputs you want...USB, AUX, etc.

The downside is you need an integration harness, the Metra TYTO-01 which is a lot more expensive than a standard harness. Here are the prices...

CD Player Installation - $50
DVD Player Installation - $100
TYTO-01 Harness - $70
Dash Kit - $20

So price just depends on if you get a cd player or dvd player. Thanks