Depends what kind of game you play, mate. I would hesitate to use a pump in a tourney where you will be facing semis and electros - the rate of fire on such a small field will keep you at a disavantage.
However, you can get pump tourneys which I hear are a blast, plus you can use a pump to good effect in a rec-day walk on. Given that you can pick up some quality pumps second-hand for next to nothing, you could always get both! I found getting a cheap pump as a first marker helped me get to know the technical ins and outs of how a marker operates and how to take it to bits.