Bob, I mostly listen to music and not movie soundtracks. Nor do I listen to multi-channel SACD. I appreciate where you're coming from, but I've found many HT preamps are too much of a compromise for me.
In general, IMO, a $3K stereo preamp will typically have better sonics than the stereo preamp section of a $3K HT unit (for 2 CH). I also prefer tubed preamps and there are not many available in HT units.
My speakers are dipolar, including the active crossed subwoofers, and I have little room interaction The performance on 2CH movie soundtracks I get with my system is good enough to suit me.
Thats just my view and opinion. I respect that many people enjoy their HT systems, and I am happy that they do so.
The Oppo looks very nice, but I believe it uses op amps in the output stage. Id rather go with a DAC unit that has a discrete analog stage. Im waiting to see how the new Wyred 4 Sound DAC featuring the Sabre32 turns out. Hi-rez 2 CH music via USB looks promising to me.