I have a lot of experience with this,
Forget the Terk, works great for FM in an attic but not Hi Deff. Use a pair of channel master 4 bow tie 4221's if you are close to the source, if you are far away; use a pair of the channel master 4228 8 bow tie antennas. It is important to properly ground the reflectors on each of the antennas, this usually improves reception and reduces your install time.