Seymour Duncan Blackouts and the Dave Mustaine Livewire signature actives are killer. I'd go with those over EMG's any day. They seem a lot more transparent sounding and can actually deliver some good attack and nuance that I find EMG's do not have. I'd definitely give them a listen and a try.
As for thin necks, I have a 1995 Ibanez S with the Wizard (I or II, I can't remember) neck and I hate it for metal. A few people on here, as well as myself, find that it tires out your hand and it sometimes gives me cramps. Super thick necks feel cumbersome to me, but awesome to others. I like the ESP/LTD "Thin U" profile, it's a nice feeling no frills easy design that's fast yet comfortable.
When I started looking into building I took a whole day and went to a guitar store and tried a ton of stuff. I started noticing that a lot of guitars have some pretty bad flaws. Not just in the finishes either, but their inherent designs. Just pick your favorite features from a bunch of models and make them into one thing.