I switched from DNM to the GR cable, these are both solid core copper but the DNM is just a single core: they have the same level of detail and similar sound staging in my system but the DNM loses a lot of weight and deep bass so it really depends on what speaker you are looking to drive. There may be other solid core copper options out there.
Currently using Duelund bare wire, which I consider mid expensive, they sound good but less hi-fi than the GR - but they have a way to be pleasant. Same for blue jeans which I suppose is the reference for a budget cable.