When you are placing the conduit for power, drop an extra conduit in for communications runs. It will cost next to nothing and you can add cables later. (power and comms should be in seperate conduits).
You are using conduits right? Makes it much easier to repair things later and allows you to swap out as needed when coax cable fades from use.
As far as cable...as long as OTA has decent reception, we won't bother hooking up standard cable (ie: no HBO or other premium channels). Far better to set up good wifi. While we don't count on it, we do value it when we find good wifi.
