A friend of mine has a Bose surround system and I think it sounds awesome. It is crystal clear and very efficient with space. I have noticed very minor ambient noises in movies are louder at a lower volume through his Bose setup.
However, I prefer the BIG holy-shit-thats-fucking-insane type of home audio. I have a 13 speaker Cerwin-Vega setup powered by Onkyo. I can hear ambient noises just as well, but the volume has to be up more compared to the Bose. I do not mind at all though because explosions are somewhat realistic when I watch movies