The Jazz is my favorite neck humbucker and it is definitely more articulate and less boomy than the 59.
A few things you could try before buying a new pickup:
1. Are you using 500k pots with a .015uf or lower capacitor with the 59 pickup?
2. Did you try backing the 59 pickup away from the strings a bit? (specifically on the bass side?)
If neither of those two things solve your problem then you would definitely love a Jazz in the neck. I have been using a Jazz for a while now and I love it. I used to have the 59 myself and switching to the Jazz made a huge difference for me.
Nothing is more boomy than the 59 neck. Going with 250 Kohm pots itstead of 500 will only remove treble. I don't see how that un-booms it.
"Nothing is more boomy than the 59 neck. Going with 250 Kohm pots itstead of 500 will only remove treble. I don't see how that un-booms it." uOpt 2-10-15
"I have never seen anybody say "59s in the neck of a Les Paul are boomy", unconditionally. Never. Stop riding that BS, Blueman. You keep messing up perfectly fine threads arguing against things nobody said in the first place." uOpt 1-29-15