Recently, I was divorced and many of electronic components were generously donated to the ex. I was left with my Panansonic 42" Plasma and Klipsch Synergy 5.1 speaker setup. However, the Pioneer Elite was given. Now, with a smaller budget to work with, do I opt for a 5.1 A/V receiver or do I purchase a 7.1 and get new speakers. Not sure how a 7.1 A/V receiver works with a 5.1 setup. Any thoughts?