Re: JB in neck...?
Hey, I'm the guy with the JB on the neck on the guitar. Mine it's an Ibanez RG1550; basswood body, maple fretboard and neck, floating trem.
I like it, a lot. It sounds very middy and really thick, unlike most pickups on this position for this kind of guitar, which tend to be kinda scooped and picky so they sound more "precise". It isn't that tight; to me it sounds sort of what you expect an LP to sound like. How accurate that really is I don't know, but it's that kind of flavor, I'm sure of it. The highs sound just right, and the bass sounds a bit bloated but nothing terrible, it's more than worth it.
It's very screamy, very unpolite, and really fun to play with. What can I tell you? Give it a shot, it's the best neck pickup I've ever tried!