I have not heard any DVD player that sounds as good as a good stand alone CD player or transport / DAC combo. I know that others here might testify otherwise, but that has been my experience. For the record, i've tried several Sony DVD's, Toshiba, Phillips, Pioneer, etc... I know that my Father went back to using his 20 bit Denon CD player over his 24 bit DVD player as he too thought it sounded better for music reproduction.
As many have tried to stress both here and in other forums, there is a LOT more to putting together a system than just assembling "good" components. System "synergy" is the key and until you hear a system that has been carefully pieced together, you will never know what your missing. It really does take a LOT of trial and error to see what clicks with your gear and personal tastes. Don't underestimate "proper set-up" of the components or how important some of the very simple yet effective tweaks can be. Pay special attention to speaker placement and try to do as much reading as possible BEFORE spending money. The archives here and at www.audioasylum.com can provide a wealth of information.
I only have one other thing to say. Keep in mind that you will be reading a lot of PERSONAL opinions. This is true of both professional reviewers and "audiophiles". As such, what they like and have set-up may not coincide with your findings, reactions or personal tastes using your system and components. Bottom line is that you have to think AND listen for yourself. Only you know what you like, can afford and are willing to go through to meet your musical needs. Best wishes and good luck.... Sean