I'm new to this, so here goes: My room: 15' x 20' with 9' ceilings 80" TV I'm looking to purchase the Denon AVR-X3000 receiver. There are so many choices regarding what speakers I should get. I'm looking for nice sounding 5.1 speakers including a sub that will be clear, with good mid range and solid base. My price cap for the speakers + sub is $1000. All of the speakers need to be wall mountable (I have kids that will destroy floor standing speakers). I've looked at reviews of Polk, Mirage, Harman Kardan, Energy, Bose and Definitive Technology speaker systems. I was going to get a Bose system but I keep reading that they are over priced and I could do much better with putting a system together myself. I really have no idea which ones to purchase as there are good and bad reviews of each. Since my room is large, I need a system that is loud enough to fill the room. I'm wondering if anyone has any recommendations? Thanks!