Its a good idea, chances of winning are slim though, and you can bet your ass that very experienced DJ's will enter as well lol however if i lived in Brissy id give it a shot...why not, its free right?
gumtree, ebay, ITM, here , only places worth looking for that sorta thing had a quick look on ebay and gumtree...not much around at the moment for traktor
well you've alerady got the mixer and TT's so you might as well get the soundcard + traktor pack used for like $300 on ebay, do you already have S4? if you do already have an S4 id get a 4 chanel soundcard and hook the TT's, Mixer and S4 into the soundcard and use the TT's as 2 decks and the S4 as the other 2 decks...that way you will always have it all set up so if you can just use whatever your feeling
im happy with the 2031A's so far, i bought them used and they are still pumping hard, im not sure about audio qaulity of them vs KRK or JBL or Mackie etc because these are the only monitors ive owned