i just got a deck that has a usb port on it for just over $100. so you use your regular ipod cord and you can control the ipod from the cd player. i think its better quality than an aux.
just keep checking the ads at best buy, circuit city, etc for deals. they always have something
get a deck with the USB in port, NOT audio in through a "headphone" jack. Quality will be like listening through tape deck if you use the two channel jack. You can get all channels using USB and yeah.. it's just better.. worth the money IMO.