PL-30 is very good. If your ipod is a touch, consider SoundMagic MP21 with mic and remote otherwise go for PL-21 or the PL-30 based on your sound preferences. I think PL-21 is bit bassy, PL-30 has good soundstage and just enough bass. PL-30 also has a knob for increasing the bass, but using that makes bass too high and muffles the other lower and mid freq.