Thanks to everyone!
You have confirmed what crossed my mind when studying "cabinet ratio", that it is important to factor for the wider-ratio sets. Unfortunately choices are scarce, out of 40 at the furniture store I like, they had only one fully enclosed cabinet set up that way. And it lacked one component shelf I needed, (leaving one item on top) which I'd rather not do. I’ll just have to keep looking.
And thanks Steve! I’ll try to spend some time soon on the site listed. Cause I have a feeling…. if I come home with the furniture for the 950/770 pretty soon, I’ll be saying, “Well that old JVC just doesn’t fill that big old hole right!”