We are thinking of adding in a batch of 8dBi UAT + ADSB antennas in our next shipment. These are wideband antennas that are tuned for both UAT and ADSB. They are about 50 inch long, which is about double the size of the FlightAware ADSB antenna.
These will be approximately $60 on Amazon, about $15 more than the FlightAware ADSB Antenna.
So is bigger really better? Put in your vote.