if your laptop is reliable, s2 is a good option.
on the other side it's from plastic, feels solid, but from plastic.
unlike the denon mc3000 = full metal/steel chasis - they call it a real workhorse.
And I don't think you need to worry about a denon mapping for traktor, it's been quite some time since it's release.
However you'll find more traktor support for the S2.
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