ARC did make a multichannel preamp, but I believe it is long gone. The remaining reasonably available high-end preamp is the Parasound Halo P7 with 2 7.1 inputs.
A lot of high end 2-channel preamps have "bypass" mode though, which let's you use an external source as the volume for movie watching, and returns to normal operatoin for music. With something like an Oppo with built in volume and analog outputs that's an easy integration.
Personally I use the P7 for everything. It comes well reviewed. Certainly a step up from the P5. :)
A lot of high end 2-channel preamps have "bypass" mode though, which let's you use an external source as the volume for movie watching, and returns to normal operatoin for music. With something like an Oppo with built in volume and analog outputs that's an easy integration.
Personally I use the P7 for everything. It comes well reviewed. Certainly a step up from the P5. :)