So I have started looking for a theater system again. What I want/need is a system that SWMBO and the kids can turn on to movie/Bluetooth with out punching a bunch of buttons. I have a decent pair of floor speakers that will be used for front/side sound and a powered sub. I'm looking for a system that has a pair of wireless rear speakers,HDMI, a center speaker/sound bar and maybe a pair of speakers on the wall by the TV. Not looking for a crazy good system, but don't want a system that sounds bad either. One issue I have is the main room is about 17'x17' with 11' ceilings and is an open floor plan with the kitchen/eating area, and everything is tile floor so not the best for audio. I'm fine with a used system from goodwill but don't know enough to say which one is a good system.
What should I start looking for?