To be honest I can't hear a difference between the two Rich. I guess their thinking is that the signal gets converted to LPCM regardless so they want the Oppo to do it. Clocking is a term I've heard before but I'm not sure what it is. The only thing online I could find describes it as a timing issue.
I use bitstream for movies and multi/ch sacd from my 105 as I find the sound more dynamic and less rolled off in the highs ;)as for stereo its analogs outs from the 105 (xlr) especially with the 2/ch sacd