I’m looking for advice on where to put two Era 100s for a surround setup. You can see in the image below we have a strange, bi-level house. The TV, beam (gen 2), and the sub-mini are on the right side of the image below. The common TV viewing points are the sectional and the kitchen table and this setup would be used for movies, TV shows, sports, and music. There’s a railing right behind the sectional where the stairs are and the back wall is about 6.5 feet behind the couch. I’m considering either mounting the era 100s to the railing posts (this wouldn’t look very clean), adding a skinny table behind the sectional for the era 100s, or running some outlets up the back wall and mounting the era 100s to the wall (this feels like the rear speakers would be too far away and might lose sound to the basement). 

Does anyone have any better ideas or any thoughts on the existing ideas? Any advice would be much appreciated.