Speaker recommendation for married couple

Is the ceiling 6' only where the speakers will be placed or the entire room?

Just as another option, you may want to look into the single driver full range speakers the likes of Omega or Decware. I've only heard a couple of their models like the Decware DNA and Omega 3XRS and the vocals sounded incredible. They need very little power to come to life but may not be aesthetically pleasing depending on your taste. One other thing to keep in mind is tubes tend to generate a lot of heat and with a room that size, especially in an attic, you may find them uncomfortable during warm days. Good luck.

I personally don't have a problem with dealers posting here as long as their input is objectively their opinion or experience. The dealers generally have a much broader exposure to different brands and models so it would be counterintuitive to not solicit input from folks who can contribute most, at least in theory.