It’s very hard to decide what ‘the best’ antenna actually is. It’s not just the antenna that you can fly the furthest on – there is far more to it than that. When looking at these antennas and deciding which ones to put into top 5, things taken into account are other people experience, how far they flew, the quality of their reception, the number of frames they dropped etc. Whilst the results are never going to be perfect, on this page you will find one of the most comprehensive sources of information explaining the what the top 5 FPV 5.8 GHz antennas are in 2017.
So without any further jibber-jabber lets get into the results on droneuplift.com