Just wanted to follow this up :D
I've just installed the rebel Yell and I love it! Comparing it side by side with a Holy Diver which I also love (in another guitar), the RY is much brasher. Not harsh though, just much more in the high mid area, and louder, with more high mid frequency presence. Whereas the HD (and the Crawler that the RY replaced) are more low-mid focused, darker, and warmer. It's almost as if with the HD there's a baffle in front of the speaker which gets taken away when playing the RY!! And split harmonics are very easy, which is also just what I wanted. I still love the HD and Crawler, but for an 80's rock guitar (including needing to cut through the mix alongside a keyboard player) the RY is perfect!