Well I went with Alpine and their new Parrot BT. In my car with two chamber flow masters with turndown pipes in my SS camaro people can't even tell I am driving in my car. The audio is clear, no echo and the unit pulls in my contacts. I use voice command from the deck with no problems. The a2dp sounds just as clear as my iPod, but I really use the iPod more than everything else.
I got mostly everything from crutchfield but wow what a nice Apline sound. I pulled out from Pioneer do to the lack of auto eq, and multi band eq's.
Spec of what I deployed
iDA-X100 retail $400us I got mine for 120 bucks new from a local retailer. New unit on the block is the iDA-X305 retails for $350us
CE-400BT
Bluetooth® Interface Module, Powered by Parrot Retails for $180us but you can get it crutchfield for $149us
http://www.crutchfield.com/p_500KCE4...arch=KCE-400BT
I did pair it up with a TUA-T550HD
HD Radio Tuner Box and PXA-H100 IMPRINT Audio Processor
Bottom line is the Parrot box seems to work really well. I am not sure if Sony or Pioneer are offering that as an outboard option yet.