Hi Neil,
When I had my potted Alinico II Stormy Mondays in a Les Paul, they gave me airyness, clarity and a very even frequency response across the tonal range. The sound at lower volumes was almost like an acoustic / semi acoustic guitar.
The clarity was so evident compared to the existing AV Gibson 490r / 498T pickups, that a friend of mine complained that they would make him "have to practice more".
I was so impressed with the SMs, that I then got a set of potted AIV Mules for the Les Paul - and transfered the SMs to an S.G.
My conclusion was that the weightier midrange of the Mules blended into the already emphasised mid range of the heavy Les paul, which suited my purposes - especially as I had fitted an out of phase switch to one pickup for a pseudo Peter Green sound.
The Stormy Monday pickups kept their own voice in the Les Paul - retaining their characteristic 'air' despite the heavy wood. This seemed unusual for such a relatively low output pickup.
My only concern is that compared to a very high out put pickup like the 'Nailbomb' - they may sound a bit too retro / mellow , and lacking 'punch' for you in comparison. Having said that, they did have enough 'spank' for Soul lines.
If I had to start again, I would probably have got a set of Peter Green wired Stormy Mondays for the Les Paul, and a pair of Riff Raffs or some sort of monster heavy pickup for the S.G.
F.F.