I like the stock unit so easy to use and with better speakers the volume doesn't go over 2/3rds, the function of the unit is just like using a stacker or single disc depends on how the music is stored. each folder represents as a cd, you just press the cd button to switch to cd stacker mode. the unit is this one.
http://www.ebay.com.au/itm/230781191...84.m1439.l2649
In case nobody noticed the theme for the car is stock but not.