Duelund speaker cable gauge for my system?

Hi everyone!

I feel like trying a different flavor of speaker cable. At the moment using some Chinese "Neardost Odin" cables (OFC copper, silver plated, teflon insulation of each individual core) and it's a very good cable, but I'm trying to get rid of everything silver plated in my system (because of a slight unnatural glare).

Using very high sensitivity horns in an active tri-amped  situation: subs <60Hz, bass and low mids 60 > 500Hz, mids and highs > 500Hz.

Average sensitivity from 60 to 20KHz is 105dB. Midbass drivers are 15inch, horn loaded.

I listen to almost every music genre there is, including electronica / techno.

In my system only the range above 60Hz would be concerned by the Duelund cable.

And, I don't know what gauge to choose! Should I take 16GA (my instinctive choice) or 12GA? I'm confused.

Also, do the recently added "dual" wires sound different than the single 16GA or 12GA?

And last but not least, is the Duelund cable suited for every musical genre? Is it smooth at high levels? (I tried Belden 9497 for a while and, while I liked it very much at low SPLs, I found it insufferably rough and gritty at higher SPLs...)

Thanks!