I totally think M100v4 is the way to go in your case. Movies were a completely different experience with M100s vs M5s. I also expect your bass to be better...more linear. Ditto with mids. Not sure about highs.

I have to say, I was totally surprised when Ian recommended the M80s. I just kept my mouth shut because I didn't want to cause you any confusion.

It may be an idea to let your wife and kids choose the finish? You get real wood veneer in a selection of stains as you probably already know.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated