Rich, good speakers will still sound good no matter where you are in the room. Maybe not ideal, but I'd rather listen off axis to a pair B&W 805S speakers than I would Silverlines, or Von Scheikert VR1's. As far as your statement about reading about the nautilus line....it might be beneficial to hear the B&W's to form an opinion. I have owned N805, Sig 805, and 805S, and never have I felt that they had to be played loud to sound good. For reference, I've also spent time with Silverlines, and I've owned Von Scheikert VR1's.
Here's my point.. if he's got money, and wants to spend it, who are we to stop him? Second, if you can afford it, I say it will sound better, EVEN lying down in bed. People that think listening is only available in the sweet spot aren't utilizing their systems to their fullest potential.
Third, what if the system gets moved, or the poster buys a new house and can have a master suite that would support a listener type environment? He's already a step ahead.