I thought you already have a Marantz, Cambridge Audio and now thinking about Oppo. To me, once you get to the kind of players you have already owned or tried, they all sound great and any difference will disappear when your don't rely on your sight. However, since you can hear those theoretical differences and found one sounded better than the other, then why not go and listen to one of these:
AUDIO PLAYERS | Esoteric
I have, and the system sounded great to the point it may be the reason why I bought the speakers on the spot. On the other hand, it really sounded just as good as players I already owned at the time. For me, if I needed just a CD player I would just grab an ES (Sony) such as the XA5400. They surely know how to make SACD sounds good, theoretically..