Well, after a great deal of though, and having listened to loads of sound clips (including BKP, Dimarzio, Seymour Duncan and EMG), I've ordered my new pickups.
Not the Holy Diver I was planning to go for, but a Mule with a pair of Mother's Milk single coils. I think the lower output of the Mule will suit my style of play more than the Holy Diver. After all, most of the 80s guitarists I love listening to weren't actually using high output pickups anyway, just standard PAF types.
Can't wait till they arrive so I can get them fitted :)