So I'm planning to buy the ESP H-1001, but I dont know if EMG's or Duncans would be more appropriate. Ill be playing it through a peavey vypyr 120t, with a dunlop crybaby.
Depends, what kind of tone are you going for?
Spin 'round carousel when your horse isn't screwed in.

My band:
Fractured Instinct
(For fans of Death/Groove/Prog Metal)

Ibanez RGA42E
Ibanez S420
LTD H-301
Ibanez RG520
Peavey Predator USA
Douglas Grendel 725
Line 6 Pod HD500X
What kind of music are you playing? I have to say, I have the 81/85 combination on my Ibanez and I got Seymour Duncan on my LTD EC-401VF and the Duncans totally own the EMGs, they're by far my favorite pickups. I play all around rock.
-Egnater Renegade
-LTD EC-256
-Crybaby 535Q, & Volume
-TC electronic NovaSystem
-Behringer VM1, VP1
-Line6 M5
-Joyo UD
-Boss NS-2, CH-1
-Moded FabEcho
Can you try them and decide for yourself as pickup choice is very subjective.
What music do you play? Which bands for example

Personally I would go with the Duncans because I don't like EMG's all that much, but that doesn't count for anything really
Current Gear
Washburn WI66 Pro //
Ibanez Prestige SA1260 //
Schecter C1 Blackjack //
Fernandes Ravelle Elite //
Wahburn HB35 Semi-Hollowbody
Blackstar HT40
I've tried both in different Schecters, also through a vypyr amp. They sounded ok, but they are better played through a real tube amp. Wait, I answered this question for you already!
For the perfect heavy metal sound:
EMG (81) humbuckers-brigde
EMG (60) humbuckers-neck

Very nice combination with good lead tones, for playing rythm guitar or a clean sound. The 81/81 or 81/85 combinations are also very good, depends on what kind of music you are playing?
I like Duncan's for more of a really vintage sounding high gain tone and they have wonderfully nice cleans. Emg's are great at what they though, mordern high gain
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