Hi - So decided to pull trigger on new model for Airport Extreme. Any tips/suggestions on how install and set it up for the 1st time? Also, I'm reviewing the setup screens online and I'm confused on Network tab - "Router Mode" section, what selection should I use? Off - Bridge Mode, DCHP Only, or DCHP and NAT? My setup includes cable connection straight to a cable modem and from there will be the AEBS, with wifi to wireless devices and hard-wiring my iMac. Thanks for all the help and insight for this newbie!