Another choice is to get a 5/6 channel power amp that is high enough quality and build to both offer dynamic range for movie soundtracks, as well as finesse for music playback.
This is a tough niche for an amp to fill, but there are a few. Most processors out now will have a 2 channel pass through, that will bypass the DSP chip, and let you use the processor as a 2 channel preamp for stereo playback. This is how my system is set up, with a Cinepro 3K6SE GOLD powering 4 Silverline Audio Sonatina II's and a Center Stage. I use an Aragon Stage 1 pre/pro which has an incredible sounding preamp section. I can switch between 2 channel direct analog stereo, and digital 5.1 with a push on the remote.
This is a tough niche for an amp to fill, but there are a few. Most processors out now will have a 2 channel pass through, that will bypass the DSP chip, and let you use the processor as a 2 channel preamp for stereo playback. This is how my system is set up, with a Cinepro 3K6SE GOLD powering 4 Silverline Audio Sonatina II's and a Center Stage. I use an Aragon Stage 1 pre/pro which has an incredible sounding preamp section. I can switch between 2 channel direct analog stereo, and digital 5.1 with a push on the remote.