I replaced my older Ref Powerlink with MM. The MM's were superior in every aspect, but most noticeably in refinement and authority. I like the Transparent cords - good inner detail, texture, full bodied images and solid bass. They seem to give incredible space and depth between instruments. Their downside would be that they are not the most detailed nor as open and nimble sounding as some others. Depends on what you're looking for.
