I have the 2009 Airport Express. I'm planning on buying the new 2013 model, but I don't really know what to expect from it. I live in a 3 floor house, and the current Airport is in the middle level. The signal is great overall, though the lower floor gets really bad reception, and the wireless N 5GHz has a very weak reach. Is it true the new Airport Extreme has 3x more range and better quality? I also heard it can transmit wi-fi N over 2.4GHz, really? What do you think?