The problem with MC mac’s video playback is that it is not as sophisticated as the Windows version, so you answered your own question.I shouldn’t have to convert files in a 3rd party app to watch them from MC. It’s much easier to put the disc in my Oppo player where, frankly, the video and audio quality is better.
That's what I don't understand. Is it just the video quality difference you see? Or do you really mean that the audio playback is better on the Oppo too? Surely you just mistyped that since you said that MC's audio playback is some of the best you've heard.
So perhaps it's mainly the video scaling that the Oppo can do so that video looks better? I don't currently run MC for Mac into an external display (or TV), so this is an area I don't have any experience with.
The other features like Theater view are definitely not anything that can be argued: The windows version has them and the Mac version doesn't. It's unfortunate as Theater view is a neat feature and we aren't likely to see it any time soon on the Mac side.
The only good news here for you is that video support for Mac is getting better incrementally. Any DVD or BD that you rip today (at full quality) will still be sitting there in your Library, waiting to be played any time. Organized perfectly as you have instructed MC to do. ...and when video support is more up to your standards, you can play the same file, only better with an improved video engine.
Or build an HTPC based on Windows and play the files there. The upgrade to a master license is really cheap. It's just having to support windows and another machine that's the real price.
Brian.