They are keepers. I'm changing them to balanced this week. I find that change immensely greater than this or that standard cable (although to be fair my Ragnarok shows that difference more than most amps). O2 free copper, well soldered connections, solid mechanical connections (if needed), shortest possible cable run - those are things to focus on no matter which type you use. Cables that cost 50% or 75% of the phones? Look at the wiring in your amp, home, and distance to the nearest transformer.... as a reformed subjectivist if you haven't done blind comparisons, it's much more likely its the expectations in your mind, and not the cables accounting for perceived differences. You have a tough load? I've seen speakers like Quad ESL, Scintillas, CLS, and others munge amps, and require cables that helped ameliorate the issues from the load. However, since you get a huge uptick from using an amp that is designed balanced (not just glued on for marketing purposes), it ends that argument.