Car Stereo for Iphone

Hey I'm looking to get a deck that supports iPhone 4 with bluetooth and iphone connectivity that will still let me use the phone for apps(TomTom namely) while its plugged in, and has a cd player as well.

Are any of you guys out there using one in your car? What model is it, and does it do everything you need?

So far I've looked at this one which is about $380 which isnt too bad.

Kenwood KDC-X8016BT
http://au.kenwood.com/Car_Entertainment/1DIN_Receivers/KDC-X8016BT

What if one day you decide you want a different phone and your car only supports the iPhone?

Does the iPhone 4 support A2DP via bluetooth? If it does you'd be better off getting any stereo that supports A2DP (the Kenwood does) as pretty much all phones will do this "just in case" you do change one day, then your car supports a generic type of connectivity rather than being locked down.

It's also wireless, i.e via bluetooth, so no cables and you can simply plug the phone charger in and use other apps like navigation etc - provided iPhone 4 supports multi tasking? I assume it does?

My car has a Sony Xplod (can't remember what model) but it does this very well.

ended up picking up the Kenwood.  does everything we need and all cordless!