I fell in love with this vehicle when it first came out. Now after paying off my current car I am in the market for a Murano. I am a known audiophile and have a extensive collection of MP3s and WMA files that i play through my Panasonic HU. Searching through these forums I saw it mentioned that you can't remove/replace the HU that comes with the Murano ? Is this true ? Are there any other alternatives besides SAT/XM ?