ACME Silver Cryo fuse is a good sounding fuse, and it is better than stock. I only had it running for less than 200 hours before I switched to 2nd Master fuse in the streamer. It is in a box doing nothing now.
Currently I have a Purple in BHK Pre, and I found this is the best place for it. Soon I will test the ACME fuse here to compare with Purple.
My system has other components that are doing break in too, but the SQ improvement has slowed down somewhat so it should be ready for the task.