He did say say 80% movies and 20% music, right? Use a SS preamp / processor, man! Turns on immeidately, mulit-channel for easy integration, no worries about ventilation and tube life, fast dynamics for loud passages, better bass, no rolled-off highs, great for explosions and gun fights, etc.
I love my all tube gear for my 100% music setup but I wouldn't try to integrate the tube preamp into my home theatre. For one thing, you don't want to wait 30 minutes for the tubes to "open up" and sound their best. And how about the complications of matching the two "tube channels" with the rest of the channels?
For your 80/20 requirement, to me its a no-brainer. I vote for Solid-State *in this situation*.