I know this has probably been discussed to death, but I am seriously torn between the x300 and x500. I am leaning toward the 500 because my room is 16' deep (seating position to TV) 13' wide, but also open to the kitchen, hall, and foyer. Also, 18' ceilings. However, I do have a 3 and 6 year old who I don't necessarily want to wake up every time we are watching because their bed is shaking!
I am definitely going with 21s on the front three, and 11s for rears. All powered by the Denon 3313.
Thoughts? I would like to order to since my wife and kids will actually be out of town next week. I.e. I would have a ton of break in time!