numark m4, is very sold, and decent never had a problem with mine when i had it, (got it 2nd hand for $50 aswell so cant complain) and they're only about $200 new? and if you're going to run traktor, you probs dont even needa wory about onboard effects filters on your mixer, as traktor has them all anyway? https://www.storedj.com.au/products/NUM-M4