Dedicated Audio SACD or CD Player vs. DVD player
As the other posts have stated, you are almost always going to get higher quality sound from a dedicated audio CD player compared to a DVD player, for multiple reasons. It's a little like comparing a thoroughbred race horse to a quarter horse. Do you want great sound or a jack-of-all-players?
Regardless of your purchase, I urge you to check out the warranty (of course longer is better). Many off-the-shelf players in the $500 to $2000 range offer crappy warranties (2 years or less). In this situation you can expect defects as soon as the warranty expires.
I purchased a Rotel RCD-02 player new but after it went out of warranty (2 years), with about 1000 hours of play time in total, it began to skip consistently. The only repair option was to send it to Rotel in New Jersey and they wanted $80 just to tell me it had a problem (not including shipping or repair cost).
This will be the final Rotel product that I purchase. These guys (Rotel) want you to keep upgrading to their higher-end products and keep you as a customer for life. But that will not happen for me as they have failed to make a decent first impression. I think its important to know where the product is assembled (avoid China - there is a reason many products are assembled there). For a real warranty, you may want to check out Bryston and some of the companies in that calibre. You really do get what you pay for.
I can only state that based on my experience, as far as quality audio goes, so long as they manufacture in China, Rotel is just another company in the same farm-team league as the other consumer audio makers like Sony, Yamaha, and Denon.