best 2005 audio upgrade?

i screwed up and bought an '05 package 6 assuming it would play mp3s and
have a line "in" option like the '06. oops! now what? my prius has the 6 cd changer and useless tape player combo. Can anyone recommend a replacement aftermarket head unit that fully integrates to factory controls or at least a sano way to hook up my ipod without a modulator or stupid tape player adapter? i really don't wan't to pull my cd collection out of the basement again.

thanks