I put my VP150 as my rear. So I have a 6.1 setup (single rear).
I was never convinced traditional 7.1 had much to offer (beyond the 5.1) and I don't know that 6.1 setup changed my mind. 150 is working just fine, but with QS8's doing their thing, VP150 isn't really pulling heavy weight. But since I had it, I put it up on the wall.