First if you don't need wifi then their no reason to buy a card. A direct cable is always best.
Next to best thing is a power line adapter.
Then comes AC wifi if you have a AC router if you dont then their no reason to buy the AC card. https://www.amazon.com/dp/B00JNA337K/ref=psdc_13983711_t3_B00OM0L9ZO
First if you don't need wifi then their no reason to buy a card. A direct cable is always best.
Next to best thing is a power line adapter.
Then comes AC wifi if you have a AC router if you dont then their no reason to buy the AC card. https://www.amazon.com/dp/B00JNA337K/ref=psdc_13983711_t3_B00OM0L9ZO