Bill, if this is not yet clear, should you wish to use one of those processors for room correction, then you cannot use the OPPO for decoding/processing. Similarly, if you want to connect to the processor with HDMI or RCA, then you also cannot use the OPPO for decoding/processing.
Out of curiosity, why do you want to do audio processing with the source, rather than with the pre/pro?
Out of curiosity, why do you want to do audio processing with the source, rather than with the pre/pro?