Just purchased a Pioneer DEH-P7800MP through Crutchfield, $100 off retail, so my HU search is over. The Scion HU project for me is over, for my taste it was a bit underpowered and didn't serve my Boston Acoustic speakers as well as I thought (I know I know, an amplifier is needed for speakers of such caliber). So within the next week or so, my Scion HU will be on sale probably through EBay or here. It is the one with the AUX button and the one Knob in the middle. I also purchased the PAC unit where it connects directly to the steering wheel controls, not the infared one. Pics will be posted once I receive all. 
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