Who makes the best AUX port system for iPhone listening?

I'm sick of having a gang of CD's in my truck, and using the lame FM plug in receiver to listen to music on my iPhone. I know GROM makes a system that allows me to plug in my iPhone, but does anyone else make a good or better system? I have an iPhone 4 now, but will be getting a 5 in a week or so, so that needs to be considered for compadability. Any help is appreciated.

Thanks.

 

Bluetooth Integration Kit for Toyota Vehicles

http://www.amazon.com/USA-BT35-TOY-Bluetooth-Phone-Interface/dp/B006WC9B2I

I just researched this today as I'm done w/ XM radio and hate my local stations.

BT35-TOY is how I'm going about it. Bluetooth is Bluetooth. Will work for Android and iPhone. All you need is a charger.

 

How does this system work compared to something like the GROM unit? I was hoping for something that plugs in other than one that uses radio. I have one now that goes through the radio, and it sucks as other peoples music can be heard when they pass me, and it's useless in the City.

Thanks.

 

BUMP