I'm only using component because I'm out of HDMI ins on my rec'r. I expect the Denon puts its best picture out over HDMI and I believe the Denon does better upscaling/upconverting (?) DVDs than either the PS3 or a couple of Panny BR players I have owned.
Your Oppo might have put MCM out over HDMI but the Denon won't.
You have to use the 5.1 outs to play SACD and DVD-A.
I thought you had one based on your sig. They are more trouble than they're worth but it's part of the sickness. Or are you in denial?