( 70% movies 30% music)... I am leaning towards the HSU VTF 15H MK2. Buying one now and another in 3 to 6 months. The Rythmik FV15HP also is in the running.
I get that you're looking for the thump in movies. I don't think you have to worry too much about "muddy" bass because:
1) None of the subs recommended by established members here will be "muddy".
2) During your 30% music, I'm guessing you don't listen at concert levels.
I think most of us use different setting in our AVR for movies and music. Mine is set to automatically give a higher sub level for TV/movies, and a lower level for music. It's easy to do, and will likely prevent any "muddy" sounds in music with any of the highly recommended subs here.
Regarding HSU vs Rythmik, both are highly regarded here. I happen to have the FV15HP, (in a large room w/ cathedral ceiling). I'll tell you I think it can rupture your spleen w/ thumps and thuds if you crank it up. I later added an SVS PB13U for balance, not for more thuds. However, I think that by itself it could knock your chair over if you cranked it up.
Bottom line: If you want the thud, get a big strong sub. Use your smaller sub with it for balance if you want. Get a 2nd big boy later if you want.