For that kind of price (300ish) you might want to try a GROM audio (check them on eBay for best price). It has a model that does bluetooth (which can also play music from your phone), connect an ipod or plays from a usb stick. You can load way more mp3-s on a USB stick that on 6 CD-s. Plus it would be easier to change/add music, not to mention it can add bluetooth to the car. It is about 140 and then 40 more for the bluetooth cable. It also looks cheaper than Dice.
I am doing the cheap way - AUX cable/connector and add a Bluetooth w A2DP adapter (Belkin AirCast). Cable - if you do it yourself - is about 20 (including the soldering iron...) and Belkin is 52.
I am planning eventually on buying a replacement head unit from China - not the Dynavin but something non-Android which I saw on ebay for about 500 (still thinking about this one as I am concerned with the return process...).