For a indoor antenna point a Terk HDTVi antenna at about 80 degree magnetic compass. Buy the HDTVi wherever you can find it . For a outdoor roof top antenna a , Antennas Direct DB4e aimed at about 80 degree magnetic compass. Buy the DB4e at
http://www.saveandreplay.com. Here is how to aim indoor and outdoor antennas ,
http://www.kyes.com/antenna/pointing/pointing.html