I would say FS. Read the thread about misleading pup names, the demon was one of them. Try the pup, and if you want you can always exchange it (21 day policy).
the FS retains single note clarity under high gain/ drive. if you solo in the neck, this unit is especially rewarding. i favour 2 pickups for such settings- the FS, the other being the Distortion :yeah:
I actually like a SD '59 bridge p-up for the neck position. It is nice and focused and has the clarity you need. Plus it works well with higher output bridge p-ups.
for the hard and heavy? You might want to look at something other duncans also. EMG and Dimarzio make some decent pups. alot of people have said that duncans always sound a little more organic and vintage (not to say they can't do anything else....). But as far as neck I'd reccomend a Dimarzio Air Norton. I've never owned one but have played it through a jcm 2000 in a used HH style Ibanez with Air Zone in the Bridge. :32: :saeek: