The choice of dipole/bipole/monopole for side and back surrounds should be guided by personal taste, room layout (including speaker placement in relation to listening position), and intended use (HT vs. music). Most surround processors are not designed around any particular type of speaker. My pre-pro manual doesn't discuss types of surround speakers (other than small vs. large) and I doubt that many other surround processor manuals discuss this topic either.
I only have one audio system. For movies I use 7.1 and for music I use 2.0 or 2.1. I currently don't do multichannel music. I have KEF dipole surrounds and Paradigm Titan monopole back surrounds. They sound fine.
You will probably be very satisfied with the ADP 150 as your surrounds and/or back surrounds. The only thing about dipoles is that your listening position needs to be within the dipole null space in order for the speakers to "disappear." The Polk website and other websites, as well as the dipole speaker operating instructions, have diagrams illustrating null space. If you can't place the dipoles correctly, then bipoles or monopoles might be better.
