Looking for some input from the forum. I have a dedicated theater room. Have just upgraded front speaker to M100s, center speaker to the VP180 and have the new QS10s on order. I have two of the old EP500s (eight years old). My question is it worth upgrading to the new EP500 sub-woofers. The sub-woofers sound good and I don't know if there would be that much of an improvement in the sound. Any and all thoughts welcomed.