Marantz vs. Oppo or Theta

Hi everyone,

Sorry for the weird comparisons.  I'm thinking of getting a Marantz 7706 because of the manual EQ features (that's right, not looking for room correction). 

My biggest issues with processors and HT receivers in the past  is that some of them just sounded like garbage.  Really really thin, like AM radios.  Several Japanese brands and Emotiva were brands I could not really listen to for long.

My question is how the Marantz compares say to the Oppo BD players, which were excellent, or say a Theta from a decade ago.  I'm not looking for perfection, but robust and transparent.

Thank you,

Erik