If i purchase tracks without DRM then when i get my new iMac will i be able to transfer those songs to the new iMac and play them??? I dont quite get this business.
The non-DRM songs are ordinary files that you can copy to any computer and play in any music player that supports .m4a format.
The DRM songs are also just ordinary files, which can you copy anywhere, but they only play in iTunes. And only in an "authorized" copy of iTunes. And you are only allowed to authorize 5 installs of iTunes at any one time.