r/ota

I recently moved about 1 mile (as a crow flies) from my previous house. On my previous house I had this antenna mounted on my roof: RCA Compact Outdoor or Attic Yagi HD TV Antenna with Super Long 75 Mile Range – Digital OTA Antenna for Clear VHF & UHF Reception.

On my brand new house, i don't have anything to mount to on the roof and don't want to drill holes. So I'm looking at mounting an antenna in my attic. I live on the north side of town, so the good news is I can get a directional antenna and point it towards the southeast and it will generally pick up all of the local tv antennas.

Questions:

1. For a new antenna that will be in an attic, pointing through an OSB and Asphalt Shingle roof how can I best "boost" it?
2. The attic is a long run from my basement server rack where my Tablo device sits. How does Coax do running about 60-80 feet? Am I better putting an outlet in the attic and putting the Tablo up there and running a cat6 ethernet the 60-80 feet down to my server rack in the basement?
3. What antenna would you recommend for this? I need about 20 miles of directional range MAX.