i have the cda 9855 with the hookup and it sounds amazing... granted it may be slow to use. do not use the fm transmitter unless absolutely necessary as it will have @!#$ty sound!!
I have my IPOD connected directly to my Pioneer with the aux connection. If you have a factory radio you can only use FM trasmitter, if you have aftermarket look and see if you have the ablity to connect directly.
Also this has been asked and posted a few times, search the Audio Forum and you should get some ideas.
Kenwood KDC-MP232 headunit with Kenwood KCA-iP500 I-pod adapter = happy darkstars
alpine 9857 and ipod adapter ftw!!!!!!!
Alpine Cda 7893 and ipod adapter... transmiter cay
just riding around in the 4 door cav
alpine CDA-9851 i pod adapter
I have an RCA to headphone wire that plugs into the aux input on my HU. Works fine.
i run mine off the AUX it sounds great and didnt cost anything cause i had the wires already