The iAudio M3 is a nice little mp3-player. The one I have is the 20Gb version, and the first concern for a car mount was how the harddisk should do with vibrations and cold/heat in the car. I took the cover of to examine what kind of harddrive it uses and found a Toshiba MK2004GAL 1.8 inch unit (http://www3.toshiba.co.jp/storage/english/spec/hdd/mk2004.htm). It has the following spec: Temperature Operating 5–60°C Non-Operating -20–65°C Not too bad, but I have to decide if I will take it inside on winter or not. To be continued...