Summary: I have 2 of these ProMonitor 800s as my 2 rear speakers for my surround sound home theater system, along with a ProCenter 1000 center channel, 2 Promonitor 1000s as my front right and left, and a Yamaha subwoofer, all attached to a Yamaha receiver. This setup is in a 17 x 15 room, and the sound is awesome. We mostly use the system for movies, with some video gaming on the PS3 and PS4.
Summary: Excellent speakers for the audio nut. For the $$$ they're hard to top. Wall mounted, they work exceptionally well. Don't spend the extra money for the pro-mount 90 to wall mount these. They're light enough that any mount will work.
Summary: I bought a pair of these Definitive Technology ProMonitor 800 speakers about a year ago to use as front height channels in a 11.2 channel home theater set up, and they worked great for the limited role they played in the system, but I didn't realize how amazing these speakers were until I set them up as a pair in my office. The sound couldn't be better.