Well I exported all itunes music to dvd and it works brilliantly...except, and I knew this was the case but tried anyway, the music I bought/downloaded through itunes is in MPEG-4 format and can't be read. So I've got folders like 'Them Crooked Vultures' with no bloody music in them!
Have downloaded an MPEG-4 to MP3 converter so am assuming that will work.
I also reckon the sound quality, once transferred to the system is better but then that might just be me!