Here's my humble 2 cents worth for you:
I have played many EMG, 81's, 85's, and the x versions of those, also the Het Set.
I have played the Duncan livewires hmet in 9 and 18v versions.
I have played a few guitars with the fishman fluence set.
I have played a lot of guitars with the Seymour Duncan blackouts in ahb1 and the ahb3 (EMTY) models.
EMG 81-85, very compressed and sterile. Quiet. Low noise and feedback. Somewhat flat in character and pretty good for chug chug Metal. They solo very well and cut thru a mix.
The Het Set is phenomenal if all you do is metal. They really sound great. Very high output.
The ahb1 blackouts were dark and gloomy..lacked a lot of character and harmonics. Perfect for doom metal, weak for leads.
The ahb-3 EMTY models are absolutely amazing. All the dynamics of a good high gain passive with all the balls and raw output of actives. They have harmonics galore! They sing for leads !
They stopped making them due to signature series contractual obligations etc. with Seven from Slipknot. (He switched to fishman)
I hear (and think) they have rebranded them as the new alt model. But I don't know that for certain.... I've been bugging the insider guys at Seymour Duncan about it since it happened and they won't budge on specifics....which also makes me think that my suspicions are true.
If you are playing clean or just rock and roll I would suggest the fishman over the ones I listed. They clean up nicely.
The downside to passives are battery issues, and the entire wiring system has to be replaced, including the output jack. (Needs to be stereo for actives)
The upside is F@cking Balls Out signal and aggression!
To do everything over after all I've learned with active tones..... I would have 1 guitar with actives and leave passives in everything else .