In a 5.1 system 1. beside for the Subswoofer what is the most important speaker to make sure you have a good quality speaker(s). 2. When listening to a DTS or DD 5.1 track on a movie how much of the sound comes from the center speaker. Is it just mostly the voice or is it anything that is in the center of the screen. IE if a machine gun is firing, and its in the center of the screen will you mostly be hearing the sound from the center or is it mostly coming from the mains and just seems that its coming from the center?