Anyone know of any sites where I can get some aftermarket GPS navi systems? I'm looking for one thats better quality than what comes with the 3, and something for a lower price than what it is when u buy the package for the 3. I am looking to get a 3 because of the navi, but the high price really makes me think "why pay all of that money for a economy car?" So can anyone help me find a good aftermarket navi system?