I don't quite believe in cable break-inEvery new cable/interconnect I’ve ever had in my system required at least some break-in time. I’ve also found that even wires that are already broken in can take some time to settle in to a new system. The Sommer might not be the right interconnect but still deserves some more time to better assess its true qualities at least IMO.
That aside, what improvements are you looking for and wha5 sound characteristics are most important to you? This info will help greatly in making recommendations.