Steve, in a nutshell, J.Valin liked the Supreme as a "greatly improved" cartridge over the over the original PC-1, which he'd liked very much. Quoting briefly from the review by JV: "The new cartridge goes lower with much better timing, focus, and resolution, goes higher with greater incisiveness, detail, and speed, plays big dynamic passages with greater power and control, and stages with even greather width and depth, and focus than the PC-1 (which, let me remind you, was and is no slouch in any of these regards). It is also much more neutral... As of this writing, the Air Tight PC-1 Supreme has less of a sonic signature than any other moving-coil I've tested, making it, possibly, the best cartridge I've tested."
He goes on to caution appropriately that "best" can only be in the context of a given cartridge/arm/table and one's listening priorities.
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