Just to be clear, I'm assuming that your home isn't currently wired for in-ceiling sound, meaning that there are no existing speakers or face plates in the ceiling today. If you wanted to install those Polks (or something similar), you would have to cut into your drywall ceiling and run speaker cables from every speaker to some sort of music source (aka an amplifier or receiver), and you'd ideally want wall-mounted volume controls as well. While it is possible to do this, you need to understand that it would be a messy and costly project and would either require you to do the work or to hire a contractor (possibly multiple) to run the wire, install the speakers and connect them, and then patch and paint the holes cut into the drywall.
That is why people are recommending the Sonos/HEOS options. You can get relatively unobtrusive Sonos speakers that sound great for background music (the Play:3 or a couple of Play:1's are nice), they are very simple to set up and operate, and don't require any modifications to your house.
If you are dedicated to the in-ceiling approach, I'd look up a local contractor who specializes in home audio, or maybe an electrician, but that cost is likely to be well over $1000.
