Thanks BillC, your comments are very helpful.
When I compared the Grover White S directly to JPS SC3 ICs I was amazined at how close these $150 wires were to the $900 competition. In the end the JPS was only marginally better in the "quietness" area. SC3 didn't ring at all and so revealed subtler details in midrange, like emotion, delicacy, stuff like that, which you wouldn't otherwise even think about. With your comments about SCs making up some ground in that black background area, Grover must be closing in on that level of performance. A little more expensive now with his SCs, but still only 25% of the cheapest of the best of the best. I too am looking forward to hearing them myself.
There was a white with black shrink, which went on tour, but I don't think it was called S. Then came White with white shrink, S. Then the graphites. Since Grover is willing to upgrade, it is a safe investment to ride the upgrades. By this time we know the mods have always been noticeable worthwhile improvements. I hope he is able to scale up easily and get the word out. A lot of people will love these.
Rich