I should sell mine, but I like keeping them as a backup in case I need to re-rip them for any reason.
Switching to CD's is what I did with my album collection post digitization!!!
MP3 players are convenient but even if the CD's are ripped at a high bit rate they still sound worse to me than CD's, which still sound worse to me than albums...it's just more than I am willing to give up, so I haven't.