Hi friends, I'm planning to buy a Home theater system for my home; but not able to finalize the system. The usage of this system will be for music and movies. My hall size is 12 x 17 where this system will be installed. I'm considering Sony (Esp. DAV-DZ340K which is 1000 Watts RMS). Please suggest how much Watt power is suitable for room size 12 X 17; And also suggest the system which would give quality sound.