Re: El Diablo question
I've never tried an El Diablo, the specs make it look like it would be an extremely dark explosion of midrange with no high end whatsoever. However I've read a few posts/reviews saying that it actually has a relatively flat EQ, with gobs of agression and output. If that's the case, I imagine it would work pretty well.
However since I've ever tried one, or even heard a clip of one, I can't in good conscience recommend one.
That being said, I think there are paths you can take before dropping that much money on a pickup that may or may not work in your guitar.
Can you tell us what kind of tone you are going for beyond just "heavy"?