It seems with fuses people worry to much regarding their cost compared to stock fuses. IMO the emphasis should be on the end result of effect on sound quality. If people got a similar improvement with a premium tube upgrade, cables, isolation/vibration platforms or component change they'd be thrilled. Going that route can often exceed the cost((by a factor of multiples sometimes) of a high grade fuse. As has been supported by testimony on this thread, there can be considerable "bang for the buck" realized in many cases. Premium fuses are easy targets to be doubtful of due to no clear explanation of why they do what they do. Sometimes you just have to listen and then judge.
Charles,