One of those is the Janos Starker / Dvorak / Cello Concerto in B minor12, very impressive, even when that kind of classical music isn't your cup of tea, that one has to be heard.
These new Mercuries from the Collectors box are as good, maybe better. I have no idea how they made it, but they have an enormous headroom, a better positioning of the instruments in the soundstage and Dynamics is outstanding good. Very close to the original LP. These CD's sound really 'alive'. There is no information available what they have done now, but they are really gorgeous. Limited to 7500 Boxes.
In the 90's was the Analog / Digital transfer done, Wilma Cozart-Fine was the Supervisor, Dennis Drake made the Mastering (with the original Masters, no copies). I bought a few from these Discs when they became available, probably they were among the best CD's ever made.