If you read the forums, Ian answered my question regrading the M80v4 and the M80v4HP. The HPv4 HP and M100v4 were designed mostly for people who like 2.0ch music at higher volumns. If you are using a Sub or subs with your Music then the difference between the M80v4 and M80v4HP is Moot ( his word Moot ) I cannot find the post right now but will look later.
If your using sub for movies and no sub for music then HP would be the choice. Now the other thing I read alot from quite a few is the M100 need room and space. Your room is 3400cf so probably arounds 17 x 24 x 8. Quite a few responses have been the M100 are 3ft away from the back wall putting these 5 ft to front.
Andrew has even commented on a post I had about extra bass I was wanting as I like 2.0 music and the M80v3 I have are not quite there. He said I'd be wanting the M100, but my room is currently 12x15.5x8 so that is not an option. 90/95db is not a great volumn and with a sub, my money be on the M80v4 and save myself $1500 plus and upgrade that SUB to the SVS Ultra
