I loved zune it had the best sorting etc
but when it died I moved to itunes, it completely de-sorted my library and lost files etc but it was user friendly and I used it to buy music anyways then as soon as I found/used this i stuck to it and an itunes skin + kept buying through itunes, but itunes after one of the updates, resorted all my music again, so I basically had to just redownload my whole library now I only use music bee
Edit as to the below comment
i selected 3-4 years as this is my 4th-5th