I design these studios for my Uni, I think I posted a pic somewhere...
Here:
https://forums.macrumors.com/posts/2105766/
Standard 5.1 out of a ProTools HD3 rig is Dynaudio BM5 monitors with a BM10s LFE.
All nicely self powered and is a good, cheap alternative for small rooms, however I favour the Air 20's and the sub mainly for the ethernet controllability.
Still, the Air system is 3 times the price.
OK it's not a cinema, it's a working systems that gets used for everything from surround recordings of orchestras, rock/pop multitracking and mixing, DVD pre-pro to DVD-a playback.