hey guys, quick question. I just got my pac-nis1 in the mail today and is going to be installed on friday. I just wanted to know how this integrates with an iphone and a bluetooth device such as a GPS. I do a fair bit of driving in my car so i'm going to have my iphone4 hooked up the pac-nis1 and I'm looking to get one of the bluetooth enabled navi devices like the garmin nuvi 3790t. Currently, I have my iphone hooked up to a griffin AM/FM transmitter and when I receive calls, I just put the phone on speaker because the voice does not play over the speakers. With the pac-nis1, does the voice play thru the speakers? If not, I'm guessing that if i get the nuvi 3790t, I can make calls thru that unit and the voice will play thru its speakers as opposed to putting the phone on speaker itself. I'm just not sure whether the voice is going to come thru the speakers if hooked up to the pac-nis1 or when i get the nuvi, if I can run my bluetooth calls through there. Thanks for any insight.