I have a Pioneer 5.1 reciever and I love it, I LOVE the power and ease of operation. It's a. Vsx-d509s yes it's older but I have not upgraded cuz I don't want to loose the power I have or it's ease of use. I am really considering go in into a 7.1 system it want the things I have now without breaking the bank. Also I was wondering if I can mount my 4 rear surrounds at the ceiling pointed down and inwards to the main seating area and still get great sound.