Hi,
I would also recommend going for a BS based setup if you can get the right speakers + amplification + sub woofers.
Even I was told by many to go with FS for movies / music in a bigger room. But I ended up getting a higher sensitivity BS for my movie setup. From my experience, I initially chose the wrong BS (KEF Q300) for movies. But I also realized that it was not just the speakers, but my Denon AVR was also struggling to drive KEFs to reference level volumes and I ended up frying my KEF 300s because my AVR clipping and fried the drivers. But I was lucky to get the drivers replaced under warranty (thanks to ProFx). But I was still not convinced that an FS would solve my problem.
After few auditions and research, I ended up upgrading to the following equipment.
Klipsh RB 81 5.0 speaker package (2 x RB-81 II + 1 x RC-62 II + 2 x RS-52 II). I am using a pair of KEF Q300 as my rear surrounds.
2 x Velodyne EQ Max 12 Subs
Emotive UMC-200 Pre Proc
Emotive XPA-200 to drive fronts (150w/ch, , all ch. driven)
Emotive UPA-500 to drive center and surrounds (80w/ch, all ch. driven)
Cross over setting is at 80Hz. My front speakers can go deeper. But crossing over at 80Hz gives me a better overall response from my setup.
I now get ear bleeding sound at around 60-70% volume and occasionally check the drivers in my RB 81 for any dents or tear

. For Indian movies, ever at 50% volume, its too loud. Only for perfectly mixed Hollywood BluRays, I need to bump up the volume to 70% to get the full effect.
You can check my other thread to see how I managed to dent the woofers of KEF Q300 -
http://www.hifivision.com/speakers/47180-unexpected-disappointing-performance-kef-q300-2.html
BTW, I am not a big fan of Klipsch sound, especially when it comes to music. They are very forward sounding and harsh for my liking. But for movies, its a blessing in disguise as you get all the sparkles and effects like in a theater. However, I almost get an ear fatigue after watching a movie. Buts thats okay, I do not do movie marathons. KEFs on the other hand are laid back in comparison and I enjoy fatigue free music sessions for 3-4 hours.
I think the choice of high sensitivity speakers + better power amps and pre proc + adding one more sub amps solved my issues.
Thanks,
John.