Hi Tonky,
I've got the dcd500ae in my main system. Got it ex-dem with a generous discount and it's good vfm. Solidly built, musical player. I compared it to budget offerings by CA and Marantz. The Denon especially impressed with its bass performance. Negatives: the transport is quite noisy, so if you set it up close to your listening position this might annoy you at lower volumes.
Hope this helps, Jack