I got my house wired for a LAN, used about 500' of CAT 5, just in time for wireless.
If your pocketbook can stretch, go wireless right from the start. That way, when you get a laptop, you can read FR anywhere in the house, front yard, or deck. I still have all the connections around, but only use them with the desktops (I have a home office).
The laptop is used many hours a day, we just carry it to wherever we are. Mrs. Balding Eagle uses it to listen to religious music/sermons, I read FR, DU (now THATS interesting!), and other stuff.
Another bit of advice. All my LAN connections end in the basement furnace room, along with the cable modem. As a result, my wireless switch is there too. The wireless range is somewhat limited because of all the metal, wires, and plumbing there. If you can, have your wireless transmitter on the main level, and not in the mechanical room.