recording mix

So here is my set up: CDJ900 nexus x2 Allen & Heath XONE23 HP Laptop (no mic port) What is my best (and cheapest) option for recording a mix? Thanks!

Hi everyone, Just bought a focusrite saffire 6 usb interface so that i can get better sound quality when recording my DJ mixes. I previously had a Numark stereo IO interface which worked fine, sound quality was good, but not excellent - which is what i'm after. But i can't see to get any sort...