Lately i've been toying around with the idea of trying out a 6.1 setup. It seems that the generally recommended setup is dipoles on the sides and directs in the rear. This seems a bit odd to me, considering that almost all rear content is matrixed rather than discrete, which is what dipole speakers are best suited to produce. I have tried dipoles in the past in a 5.1 setup and prefer direct speakers, but was thinking of trying a 6.1 setup with a single dipole speaker, mounted directly behind the listening position on the rear wall. My thinking is that this would create a diffused rear sound field from the matrixed rear-center channel. This setup should also not have the same problems as a single direct radiating speaker behind the listener, as the dipole will be firing along both sides of the rear wall. Has anyone ever tried a setup like this? Any feedback?