rekordbox is a music library and that's all. the only way i would ever use rekordbox as the music library is if i didn't need to use virutal dj as a visual aid for scratching. in other words. if there is no scratch + zoom feature in the cdj 2k mk1, then there is no need to use rekordbox.
have any of you even seen the latest version of virtual dj? it is so beautiful..
and even then, rekordbox still sucks as a music library. it's so "only use pioneer" oriented. and that's not fair either.