Hey dude welcome to the forums. For what you are doing i'd keep the gear you have at the moment and save until your current controller breaks or you have saved enough for an S4. As i said before if you are going to stick with a laptop and a midi controller you're best bet would be to save up for a Traktor S4, Denon MC6000(i think it's called) or even a Vestax VCI-100 from DJTechTools. For more info PM me i'd be glad to give you advice