I currently have my iMac connected to the AirPort Extreme via Ethernet. I also have my PS3 and Xbox 360 connected via wi-fi and occasionally my iPhone 4 and my girlfriends iPhone 4. Network 1 has all my devices and Network 2 is the "guest" network which is for my girlfriend and anyone else that might be visiting. My question is: is there a difference or advantage to separate the networks by N/G or does it not matter. For example should I make a Network N for my N devices and a Network G for my G devices? I just want to make sure I'm getting the most (speed) out of my network. Any help would be appreciated.