Activecaptain did an entire series on wiring up the boat for WIFI a couple of months ago. Tried to find a link for you, but if you go to activecaptain.com, maybe you'll have better luck. It was really in depth and explained the different features of different routers and other equipment as well as why he chose the equipment he did. Hopefully this will be a good starting point.
Good Luck
Happy New Year!