Sounds like you dislike overtly fat sounding neck pickups, as they can certainly come across as honky and muddy if you've got your amp set to make the bridge pickup sound fatter.
Dimarzio has some great offerings for clear sounding neck pickups, and you certainly don't want high output in the neck position because the strings inherently vibrate much more and therefore much louder at the neck position.
Do you like the Gravity Storm in the bridge? If you do and you've got your amp set to complement it, don't mess with it. I've tried a bunch of things from mega high output like the Evolution to low output like Suhr SSV and Dimarzio EJ Custom in the bridge. Ultimately it's how you set your amp that makes each pickup work, and there are certain general EQ characteristics based on the magnet and output of the pickups.
Don't forget, the height of the pickup matters A LOT. If you don't pay attention to adjusting the height by really using your ears to listen, you can buy any great pickup and end up making it sound ****.
I would recommend the following for your neck position:
Air Norton: Rich and fat sounding, but plenty of brightness and clarity. On the hot side for a neck pickup, but not honky. I see it as a more modern, tighter, and harmonically rich take on the classic creamy Les Paul neck pickup tone. You won't be disappointed with this one, as it is also extremely versatile. Cleans up very well, and if you roll off the tone knob you've got some sweet sounding jazz tones to die for. Did I mention that it can also split like a Olympic gymnast? Heavenly cleans from splitting this one! It is now the staple neck pickup for prog metal players thanks to John Petrucci using this thing in the neck for over 20 years. Buy any high end Ibanez and they put this in the neck, for good reasons. Ibanez guitars are really selling like hot cakes these days among the heavy music crowd ever since they stopped shipping them with their old terrible stock pickups.
EJ Custom Neck: If this pickup isn't clear to you, then no humbucker is. Lower output and stays extremely clean unless you deliberately slap on distortion. Has a lot of chime and jangle, reminds me of TV Jones. Slap on some delay with a semi dirty channel and you'll pretty much sound like The Edge. Under high gain this thing really shines with its unmatched clarity and definition. Notes never bleed together, and if you're good at sweep picking it makes every note sound as clear as the sun in the summer sky. Best part about it though? Despite the amazing articulation it has, it's NOT a trebly or fizzy sounding pickup. The highs roll off very nicely. Very pleasant overall, highly recommend.
PAF Master: You might dig this one if you like P90 neck tones. Low output, and because it's supposed to be accurate to an old original PAF, it's got some P90 qualities to it (Gibson invented the PAF to replace the P90s). Of course the P90s will be a tad gnarlier and brighter, but this kind of rolls off that treble if you're into that kind of thing. Not a whole lot of bass so it shouldn't get too muddy.
