I need to get a Pre-amp to pick up two channels clearer and eventually to pick up digital signals as well. What is the best pre-amp to get. My set up has an antenna in the attic which is picking up most channels 60 miles away, but two of the channels are a few degrees from the others. I have the antenna running through a coax that runs from the attic using a cable that is also being used to send a dish signal to the room next to the attic. It then goes out to two TV's. The coax runs are fairly long because they run from the attic down to the basement and back upstairs again. What is the best Pre-amp to get?