I find the 80's are great for base, but my teenagers like the sub with their style of music. I only use the sub for movies. I heard the 60's as well with and without the sub. I thought they sounded great as well. It is all each to his own preference. If I really want to enjoy the base of my sub with a great movie, I have to do it without the wife in the house. She makes me turn it right down even when she is up in the bedroom over the garage. I say she is a little sensitive. I'd say with your young family the 60's would be more then enough even with the fairly large room. I really only use the full range of the 80's on rare occasions. I didn't do a side by side with the 60's and 80's but they pretty much sound the same.
I also purchased from the factory, very satisfied with that choice.
