Pioneer DVD players like the dv-600 has a good DAC, kung hindi naman masyadong matalas ang pandinig mo like some of the audiophiles here, pwede na yun... but i suggest and most of the members here would agree that it's still best if you're going to get a separate set-up for audio.
Note that If you're going to use your existing HT setup for your audio listening, medyo useless din kung bibili ka ng CD player coz hindi mo rin magagamit ang DAC ng CD player coz your receiver will process the sounds pa rin, so DAC pa rin ng receiver ang magiging output, not unless your receiver has a CD Direct option, meaning the DAC of your cd player ang gagamitin for sound output
goodluck bro