Aesthetically, I like #3 the best, and it seems to have the most functionality with the SD card and USB options in addition to the AUX input. However, I also note it's the weakest on-board amp of the lot. I assume you aren't running the head unit through an external amp in this car?

How do you listen to your music? If it's just through a phone/iPod and you'll only be using the AUX jack, then I'd probably go with one of the more powerful Pyles.

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