The Oyaide R1 and Furutech NCF series are reference receptacles. I suggested the Oyaide because that's what I use and have been very happy with them. It's also about half price of the Furutech once you include all the fittings.
I sincerely doubt that the Purple receptacle is better than these two but maybe it is, I'm not pulling my rack apart to find out.
If you want maximum detail in a fuse this is a detail monster. I have one in my power supply. Power House Zero 2 Extreme. They may be an offshoot of QSA, about $600 - my limit for fuses.