I've been meaning to get a neck pickup, but im not sure which one will suit my needs!
i'm looking for a Yngwie/Romeo type of tone
this is going into my RG550, which currently has a Tone Zone in the bridge
As cliche as the TZ/AN combo is, I think the Air Norton makes a great neck pickup in 550's.
But remember, Yngwie is using single coils in the neck. You might also have pretty good luck with the Humbucker from Hell. Duncan Distortion in the neck might also suit your needs, because it's a pretty heavy duty pickup that will match with the TZ, yet it still has a little bit of a treble bite for a neck pickup.
air norton, then coil tap it to get the single coil tones. it makes for a fat single coil...just make sure the neck coil is the one that's hot when you tap it.
the paf joe is a really good choice. a little stroked down from an air norton, but sounds very good. more well rounded than the fat air norton, which is really fat and smooth without mud. the joe has more air around it and has great pick attack for a neck pickup. so its pretty much a toss up on those 2.
I think i'll go for the Humbucker From Hell, it sounds promising, just read some stuff about it and apparently it sounds like a Single Coil on steriods sounds good to me, aslong as i get the Yngwie tone