I have both ICs and speaker cables made from Duelund wire, as well as multiple other ICs and speaker cables here. This review is actually about TWL cables that are made from vintage Western Electric wire, which was the impetus for the Duelund wire. They don’t sound exactly the same but I find the sonic descriptions in the review to be generally applicable to cables made from both WE wire and Duelund wire.
I find 16 awg to be a bit beefy for constructing ICs and my experience is that the 20 awg twisted pair Duelund wire would generally be better for ICs. If you must use the 16 awg wire, you might try using ICs from the 20 awg wire from source to pre and ICs from the 16 awg wire from pre to amp(s).
Having a bunch of wire here, at least in my experience, which specific wire sounds best, and with which equipment, is a bit of a crapshoot. If possible, don’t sell your existing cables until you can compare them directly with the Duelund cables.
BTW, if you are constructing the cables yourself, the twisted pair in a cotton casing is convenient to use but you may consider adding a shield outside the casing and then some form of techflex outside of the assembly. For single-ended ICs, I would connect the shield at the source end only. For balanced, I would do the same and then add a counter-spiraled ground wire outside of the shield that is connected at both ends. Others do it differently so YMMV.
IME, the WE or Duelund wire is sometimes but not always the best sounding option, but it is always a good-sounding option.