Being that you will be powering 4 TV's I recommend the
Winegard 7694P antenna. I would try without an amplifier first since we don't know how much signal loss the attic install will present. If reception proves unreliable, I recommend the
CM 3414 distribution amp to make up for the 4 splits.
Let's see what others have to say. (Ooops, looks like Tower Guy already chimed in)