to be brutally honest with u.
my advice would be to get whatever you can afford, give it a go and get it out of your system without spunking too much money.
normally i wouldn't advise this but you sound like everyone else i've know that wanted to try it and then gave it up shortly after. hey i could well be wrong but thats the impression i get.
ur other threads stink of this attitude.
who makes money out of making tunes
who rates mainstream djs
no offence but i would ask yourself what you want to get out of dj'ing/producing and go from there. if ur passionate about it. go high end equipment, dj finance sites can help spread the cost.
2nd hand budget decks £100 + £20 budget mixer + cables, headphones, extension lead, amp speakers, possibly need replacment needles/carts too. some of which u may already have.
2nd hand technics £350 upwards... slightly better mixer £100
2nd hand cdj's... not really sure... still quite expensive tho, depending on quality.
personally i think u might be better off with a budget dj controller and use it with trackor or virtual dj