Surround pre quality

I am expecting the new Oppo BDP-83 soon. I plan on using the dvd player for processing the audio and the analog outputs into a receiver or processor. If I am not using one of these for the processing does the quality of the unit make that much difference? I have a Rotel RSX-1055 receiver that has 5.1 inputs would that sound close to a Rotel 968 Lexicon, MC4 or Krell Soundstage? I won't be using the internal amps of the receiver. I also don't care about the 2-channel performance, I have a separate pre for that.
Thanks
Jeff