Speaker cable advice


I have a pair of Clear Day speaker cables and am looking for an upgrade as I think they are now the weak link in my system.  Looking for something a tad warmer as well with more fleshed out tones.  Any advice appreciated.  

My system: Rega Osiris, Rega Isis, Rega Aura, Rega P10, Harbeth C7ES-3, Shunyata power
mikecorwin
My experience with silver interconnects is they thrive on extended burn in times on a cable cooker. 
Duelund tinned copper from Partsconnexion, Bare wire terminations. 12 or 16g depending on how long. I have a double run of 16g (approx 13ga) and have bought and sold a number of heavy hitters costing up a grand while hanging on to these.