Reply to Audio Interface

Am about to order a Mackie D.4 Pro 4 channel mixer, and need a larger soundcard to pump songs from the computer to it.

Would prefer
NI Audio 8 / 10 / 6, but open to others

Otherwise, it needs to output 3 stereo channels at minimum, but 4 is preferred
Not looking to spend in excess of $200, however wiling to throw in Launchpad + Audio 2 in addition to cash
Very flexible, willing to work with any good offers