Although I have installed all the cabling in my house and set up the whole home system, I'm looking for help with what receiver setup would be the best. Not an area I keep up to date on. I'm able to upgrade receivers thru the protection plan. Present list of receivers is: H24-700 HR22-100 HR21-100 H24-700 HR24-500 What should I be looking at for the upgrade? What should I keep, what should I upgrade? Thanks in advance for helping!