The Denon DVD-5000 is quite the interesting piece of gear.
That is cool that it can be used as a DAC from looking at the back of it. Who would have thought that using the digital input on the DVD5000 and it would output to the analog outputs. Whenever I saw the digital inputs and outputs on a DVD player I thought only the digital outputs were active when the digital input was used.
I think the older Phillips DAC is along the lines of what Rich said above. To me they are a little smoother and don't have as much detail as the newer Sabre DACs. They do have some life in my experience but not as much sparkle and detail but it is a fine line. I have a NOS DAC that I keep around when I want a different flavor to the music.
As long as you enjoy the DVD5000 keep enjoying it. If I had a working DVD5000 and liked the sound a lot I would keep it just for the cool factor. A 40 lb DAC with that insane power supply. Good stuff.