Crafting a perfect Margarita presents the same challenge as a perfect Manhattan - with so few ingredients every one of them can break the drink and even subtle changes in technique can alter the final elixir. Packing 10 bottles a mile in 100 degree heat, preparing 8 identical cocktails in a few short minutes, and seeking exotic ingredients from afar has given this project an air of mysticism and spiritual discipline. It's also left me blackout drunk. But some journey's must be taken, and here you'll find the first leg - the best tequila for a heavenly Margarita.