Hi Zach,
You don't need a quality "hi-fi" tuner because it sounds good. Your simple FM transmitter won't sound good anyway. It will sound something like an AM radio, or like a hi-fi that has its treble control turned all the way down.
You need a quality tuner that doesn't overload all the time, and has very good selectivity and sensitivity, so that it picks-up your transmission far away. Clock radios and most pocket radios are junk. Many "stereos" are junk too, it depends on the quality.
Most car radios are good, and up here, Radio Shack sells quality Grundig portable radios, but I haven't tried one.
You know what quality means: $$$$$, and sometimes, namebrand too.