Sony 9100ES, Oppo 103 105

The Sony is a very good player. Since you are using it for 5.1 DVD movies, you most likely feed its signal into a multi-channel processor. In that case, you won't hear any difference at all. If I were you, I would save the money for something else.

I agree with Sidssp. I doubt you will notice any difference between the 2 if you are using it as a transport. There is one thing you may want to try. I had the 9000ES and had a very interesting experience with it. It took me a couple of weeks to figure it out, but what happened was it degraded the sound quality of my system when I was using other sources. When I removed it from my system, it went back to normal. You may want to try a power cord like a JPS Digital AC or a line conditioner that isolates each outlet. Even if the Sony is your only source, you could probably make it sound better with some power products. Try before you buy, though. I get everything like this from Cable Co first. That way I don't waste money.

Thanks, Just what I wanted to hear, as the Sony is working great and is so easy to use.