@yogiboy: Speaking of mono Everly Brothers albums, when the brothers moved from Cadence Records to Warner Brothers, they rerecorded all their hit songs in stereo (the Cadence recordings were monaural), and Warners released those recordings on an album entitled The Very Best Of The Everly Brothers (WB catalog no. WS1554). That was the first album of theirs I acquired, in 1969. The fidelity of those recordings is fantastic! The front cover of the LP is emblazed with the proclamation "NEWLY RECORDED."
In the 1980’s I crossed paths with Rhino Records reissue engineer Bill Inglot in the Rhino storefront in Westwood Village. By that time I had numerous Everly Brothers albums that had been reissued by both Rhino and Ace, and found the Ace versions somewhat superior to the Rhino’s. I asked Bill if he had heard the Ace LP’s (and told him I thought the Ace sounded better than the Rhinos he had mastered. How rude!). He replied he had, and agreed with me about the Ace LP’s sounding better than the Rhinos. He attributed that superiority to the better electronic mastering chain Ace had in relation to that of Rhino.