Any way, to summerise:

Its probably better to burn the files onto CD in the CD audio format rather than MP3 / WAV / WMA / etc. The sound quality wont be improved as once the damage is done to an MP3, its damaged for life. But atleast if its a CD audio, then you know it will work on any CD player (providing the CD-R's are of a good enough quality as there really are some nasty cheepo CD-R's out there)