I know that for every song I have purchased from the iTunes store I can download it regardless and at any time. I was thinking of subscribing to iTunes Match to get a similar service for all the songs I have bought from other sources. I was thinking though, if I unsubscribe at a later date will I no longer be able to download the songs that I didn't purchase from apple through iTunes?

Or will all my songs that are recognised by "Match" be classed as purchased through iTunes and available to download indefinitely?