The Rebel Yell neck is generally more closely associated with the Cold Sweat neck. The Holydiver neck is a much lighter wind and it maintains a distinctly PAF flavour but the AV magnet keeps things very articulate whereas more traditional PAF pups can start to get too loose in the bottom end. Whenever I think of Dave Murray's neck tone from when he was using PAF-style pups in the neck, I always think of the Holydiver because that's easily the BKP that has got me closest to that tone. To me, your other option would be an Emerald neck. It has the AIV magnet to give it some PAF flavour but it's hotter, darker and has a more modern twist to it compared to the Holydiver.