What is the best single din Navigation built in head unit on the market today for the money. I have I have never been big on spending a bunch of money on Head Units and I normally process sound externally but I have heard they have come a while since my last purchase (2007). I am limited to single din and there is nothing I can do about it so I know my choices are limited. I was kinda looking at the Clarion Clarion NZ500 as it looks since I have been looking for the last two weeks it just dropped $300 to $499. It has Navigation and Bluetooth (Kinda nice since I had to give up my Audi to get financed to get a house). But is there something better out there?