Steering wheel controls and ipod interface

[matrixprime]

I want to put a new dvd nav headunit into my scion, but would rather not lose the steering wheel controls or the ipod interface. If I have to lose one then the ipod, but not the steering wheel controls. Could someone suggest a headunit and a possible solution to my audio problem?

[xDTool]

Almost all pioneer decks have both a USB (for iPod and thumb drive) and a port for a steering wheel control module.

This is a potential setup (there are cheaper and more expensive decks with nav, but this is a good middle ground):

AVIC-X910BT (http://www.amazon.com/Pioneer-AVIC-X910BT-5-8-Inch-Navigation-Bluetooth/dp/B002EGVR6O/ref=sr_1_1?ie=UTF8&s=electronics&qid=1269384875&sr=1-1)

AVIC-910 iPod Cable (http://www.amazon.com/Pioneer-Cd-Iu230V-Direct-Avic-F900Bt-Avic-F700Bt/dp/B0017PGTF2/ref=dp_cp_ob_e_title_2?ie=UTF8&qid=1269384875&sr=1-1)

Steering Wheel Interface (http://www.amazon.com/PAC-SWI-PS-Steering-control-interface/dp/B000AXW7SA/ref=dp_cp_ob_e_title_3?ie=UTF8&qid=1269384875&sr=1-1)