Best cartridge I have heard : KOETSE Red.
Its was eons ( 25 years ? ) ago ....
You mean Koetsu Red... 25 years ago, you would have heard the original Longbody version made by the legendary Sugano San!
I too have one of his creations: an original Longbody Kotesu Onyx!
I will be setting it up the coming weekend and will keep all of you posted about my experience with this absolute top of the line (of its time) cart!
Its current version sells for USD 8,500 upwards, btw!