seriously matt? were your audio files 320kbps? do some google searching, i know you can take apart your deck and hardwire a 3.5mm headphone jack to allow you to use it rather than your input function. i'm not entirely sure if that's accurate, but i know something of the sort is workable. if you can't find that article or don't have the know-how, go with a transmitter. usually the amount of money spent directly influences quality.
out of 5 or 6 that i have owned, this dlo was the best for sound quality, hands down.