I don't know when that model's debut was, but a couple years ago I trashed a harmon/kardon CD changer that had started having problems with the tray not unlocking when trying to change CDs. It was one of their old top-opening carousel changers, and was ~$800 in the early 90's. I started using a much cheaper and newer Panasonic DVD changer for CDs which had a lot more features. A few weeks after the 1 yr. warranty on it ended, it died.
I got almost 13 years out of the h/k, and less than 13 months out of the Panasonic. Despite the much greater selection of features on the new stuff, sometimes I do wish I'd gotten that h/k repaired instead of throwing it away.
Right now I use my Onkyo upconverting DVD player for CDs in my living room, but am not happy with the sound. I'm planning to get a dedicated CD player soon, but am lost about what is "good" in today's market.
I'm not stuck in the past, but audio equipment's quality seems to have dropped considerably over the years, along with the prices. My old h/k receiver is now over 16 years old, and I have little desire to replace it, even though I've upgraded speakers twice(Sony to Yamaha to Infinity).
Not sure where I'm going with all the rambling, except maybe to say that if you're happy with the Denon, and it has been reliable for a long time, maybe it is worth at least checking on how much it will cost to repair rather than replace it with a more modern "disposable" model, or with an expensive premium player.