oh hell I love this topics because I LOVE EMGs.
my primary guitar is a B.C Rich Kerry King sig, it's loaded with 81/81 and I can really confidently say that nothing comes close to the kind of brilliant, full, cutting, powerful yet clean tone i'm getting out of my EMGs.
The headroom is unbelievable spacious and it's very easy to get a good dirty tone with most settings that i've come to played with at home or on stage.
However, to be fair I have to admit that the tone is too powerful for softer playing, I still play clean passages, but I have to reduce the amp gain significantly more than my passive guitars to be able to strum aggressively without overdriving the amp.
In any case, it's my personal opinion that it's the best pickups for anything from rock to grindcore. \m/