So should it be presumed that the someone walking into this room from the hallway could get whacked by the front door being opened on him?
swampwiz, it does look like that, doesn't it! Fortunately, that is just a bad rendering of the floorplan drawing and the actual room is not like that, the front door, fully open, does not touch even the door frame of the hallway door. Also, I believe the front door and tv room door are actually aligned (I'll check when I go home though), again, just a feature of the quickly thrown together drawing. The thing I paid the most attention to was making sure the length of the piano image and the wall lengths were to scale, which I think they mostly are.
Steve, thanks for that link, I've read that article over and over again. It's tricky though, because I have those two (door-less) doorways, which I know change the equation in meaningful ways.
Anyway, for now, we're going with layout #10 and once the piano is in place, I will see how it sounds.
j&j, once the purchase was decided, the piano movers weren't available immediately, so I've had these last few days with time on my hands (anxiously awaiting piano-delivery day!) and decided to fill the time with preparing.
We'll see how it goes. I'll post some photos once the piano is in place. (I am soooo excited!!