I am about to tear apart a 16x22ft room in my 135yo farm house and have been talked into (although it didn't take much talking after hearing my brothers system

) placing a rough in for speakers. I'm leaning towards in wall but have been looking at in ceiling also.
I'm probably going to be buying middle of the road speakers. Just wondering which mounting position would sound better or if its just a preference thing.
Any input would be greatly appreciated as we're kinda at an impass and about ready to flip a coin. Thanks, DJ