Right now, my home theater is set up as 5.1. I plan on adding side surrounds to make it 7.1. I would also like to add a pair of outdoor speakers which can be operated independently. I understand I have a channel free on my amp to provide 200-300 watts but do not know if that can separate the left and right surrounds. How can I achieve my HT goal? I am a novice but appreciate all help that can point me in the right direction.