How do like your new qs4's sound-wise? I'm looking to replace my Bose 161s (soon, I hope) that I'm currently using as surrounds. My setup is very similar, room-size is about the same, m3s for fronts, vp100 for center, but a Yamaha sub. Do they match well with the m3s? Also, if you don't mind, what receiver are you using? I'm also looking to upgrade from my 65-watt Onkyo SR500.