using $5 Monoprice coax cable now, what improvements would upgrading bring?

Duelund 16ga speaker wire

I wonder if I use the correct terminology. When I say coax I mean digital coax from the back of my Oppo into the DAC on my Halo.

thanks to all who responded

I should have just asked for a recommendation on a good digital coax cable that does not cost an arm and a leg.

:)

thanks soix

I am slowly learning...