I have to agree with Librero a bit here...
Though I actually agree a lot of high-output humbuckers sound a little 2-dimensional (not that I dont appreciate the mountains of difference between some of them), but thats what they are there for! If you want a pickup that will handle your average distortion as well as nicer clean tones, the Seymour Duncan JB seems to please a LOT of people, not to mention how many guitars it seems to come standard in. However, if you want a searing, crushing, awesomely heavy kickass mother of a pickup, you woudln't want it for playing jazz would you, and chances are unless you place very unreasonable expectations on your specialised equipement, you probably wouldnt be THAT finicky about the quality of clean tones from said pickup.
If you want a metal pickup, the ones you listed at the beginning are a great place to start, and I suggest you stick to those sorts of pickups. They may not be EMG or Seymour Duncan, but I own a range of GFS pickups, and I can say that as they get higher in output (distortion, mega distortion ect ect), the clean tones DO suffer, however, for even the most monster distortion (except maybe the invader style one), with the right EQ changes on my effects board I can coax a clean sound thats more than suitable for any clean tones I would want to use within a heavy rock/metal context.
If wanted something else, I would use one of my other guitars that have less beefy pickups.
Good luck, let us know what you choose in the end!
- Dan
PS: I should elaborate; I have heard that the Duncan JB is actually a quite nice pickup for both handling clean and distorted tones, maybe leaning a -fraction- toward the distorted tones, so if your a bit hesitant on going all out high-output, then you should check it out.