It looks like you bought a pair of M80s for $450 plus $100 shipping for $550 total. They cost $665 each as new or $599 each from factory outlet. If they function as good as they look on ebay, I would say that you got yourself an incredible deal. I would not sell or swap them if I were you. You may end up kicking yourself for doing this. You should not feel rushed into putting together your HT system. Take your time, evaluate various receivers, consider your budget, and don't be pressured into buying any one unit.

John

John
Our HT