I've have had the all of the Dice systems and they are great if you have a non-Nav vehicle. But if you have Nav I don't think you can beat the Intravee II.

I also have the Aux Input up front, but passengers use that if they want to listen to stuff on their iPhone, it doesn't get much usage from me. But its cheap, easy to install and sounds great as well!

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Jeff
Current:
'07 Jeep Wrangler
'06 BMW X5 3.0i

Former:
'12 WRX; '08 WRX; '06 BMW X5 4.8is Dinan S1; '02 BMW 530i Dinan S2