That depends on the length of the additional coaxial runs you need to run to connect the additional televisions. I would recommend something that is going to give you more than a 4 dB gain. In your situation, I would probably recommend the following which should take care of all your current and future needs: Antennas Direct - 8-Output HDTV Distribution Amplifier - Copper
Model:CDA8 SKU:6334319