My "viewing area" is about 12x15, but its in an appt and one side isnt a wall, its just open to a dining and kitchen area, so its a huge space.
Panny XR50, B&W DM303, LCR3, Mirage 8 sub. speakers are 88db at 8 ohms.
It's got more than enough punch for me. Honestly I havent SERIOUSLY cranked it only because things become horrible with the bad accoustics of my room. I will say that even at high, but not insane, volume levels the sound is superb for home theater, excellent detail and clarity in voices even in sonically crowded scenes. Far better than my old h/k AVR300. It's an extremely amazing unit that for me is superb audio wise. It's lacking a bit feature wise, but its got it where it counts as far as im concerned.