The layout of your office and the density of your users will dictate the design.
You want to in effect have your users split evenly on all your AP. You will likely have to put multiple AP fairly close together in some areas. You have to plan the channels so they do not interfere which likely means you want to decrease the transmit power on some of the AP.
In general you want devices that can be run on PoE. This allows you to put in them in the ceilings of work areas and not worry about how to get electricity....it also let you run a single UPS instead of worrying about power in every location.
Most the difference between a enterprise product and a consumer product are related to management of the devices. Gets to be a pain...