I have a Harmon Kardon AVR 130 receiver that states 50W per channel (2 channel) and 45W per channel (5 channel). I'd like to buy some floorstanding speakers, but don't know what to get. I've been reading reviews and am going in circles. I'm willing to spend around $800 CAD, but the catch is that they have to be common enough that I can easily purchase the center and surrounds when I get more money. I like my speakers to look big and tall. The room size is probably about 12' x 14'. Any recommendations? Also, a lot of speaker specs state really wide amplifier ranges i.e. 10W - 400W? How is that information useful?