Well, I've put up some M2's for heights and the difference is stunning. I have them angled down at the listener. I'm using DSX height mode (not IIz). I can imagine a purest wanting just 5.1 or 7.1, but these speakers aren't going anywhere. They create a giant wall of sound. I just ordered some M2's for wides as well. Should be fun!

Epson 8350 * Denon 4311CI * XPA-5 * M80/VP180 * 2 QS8's+M2v3-DSX * SVS PC13-Ultra ** Buttkicker LFE