Nocturnal if you are beginner choose standart one such Rider-Waite or Sharman-Casseli decks .They have standart images and symbols and will be more easy for you to relate to them .Also there are many books that guide you how to use them .
Or you can choose another one (make sure it is standart ) by gut feeling .You somehow should relate to the artwork and and deck .
This site has gallery that has previews of many decks ,including pictures ,tips and ratings about the decks .
Good luck finding your perfect deck !:)