Which Alfa AWUS wi-fi adapter best for Mac Pro 1.1 A1186 with 10.7 OS and an Asus RT-AC66R router?

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Which Alfa AWUS wi-fi adapter best for Mac Pro 1.1 A1186 with 10.7 OS and an Asus RT-AC66R router

Data alliance lists 5 different models;
036NHR
036AC
036ACH
036NHV
052NH