I guess this is the best place to put this, since I'm open to the AVIC units as well as other systems...
I'm looking to buy a new in-dash nav system, but am having trouble finding info on the behavior of the various models. I've had two cars before with built-in nav, one of them (Mercedes CLK500), the volume of any audio source that you're listening to completely cuts out whenever a new turn is given. This is incredibly annoying when it gives 3 updates for each upcoming turn (in 1/2 mile, in 500 ft, next left, etc.). The other car (Infiniti G35) I believe would allow you to adjust the v
