You can also burn those MP3s to CD-R, fitting a lot more music on each one, thereby limiting the overall number of discs to store and organize. Your DVD player should play an MP3 disc, no problem.

A lot of work and then of course you'd have to get rid of the originals, or the whole original purpose will have been defeated.

More than I'm willing to do. I'm considering devoting a whole wall to build a storage unit for all my CDs. Love to get around to converting all my old vinyl to CD, though.