I have a room that is about 3.5m squared. My plasma is gonna be on top of fireplace - so relatively high. What is the best position for the front L and R speakers. a) in terms of height. ie top end of plasma? - middle of plasma? - bottom of plasma? - or lower than the plasma? [assume speakers are 10cm wide and 15cm long.[ b) in terms of sideways distance away from the plasma - 1 feet? 2 feet.. 5 feet?