Reply to which controller is good to start?

hello would like to help me with a question that I have, I have always liked the world of electronics, but I was never encouraged to get into it, in order want to buy my first mixer controller, but would like to know what suggestions can make me to buy the best, I am from Venezuela and I'll buy outside the country via the Internet, I want a driver that is not worth more than $ 500 U.S., and both read and seen as the pioneer ergo or Numark N4 4deck, maybe denom mc3000 are good to start and already following terms for intermediate and advanced experience, which also are good and cheap headphones .. well I hope I hope your answers help .. regards