Though your question is simple, the answer is not...
The "right" deck, doesn't excist, at least not as a universal standard. Each individual will form his or her own relation to a deck. Some stick wih one, others use several. I myself use different decks for different readings, for instance (or several for one reading at times).
How you vallue a deck is highly personal and no one can really answer it for you. But perhaps if you are more specific on how and why you use the cards peeps here can give you some suggestions.
I personally would advice you either Haindl or Toth at this point because they work on many levels allowing you to do comfortable readings while learning the different, perhaps more complicated layers of Tarot that move in the background (Kabbalah, Astrology, Alchemy etc.). But that's little more then what prung to mind after reading your post.