The neck pickup may be too high. You should have 6/32" (4.76mm) between the bottom of the strings and the plastic pickup cover.
The FAQ at
http://www.music-man.com has the setup specs; it may be worth checking them.
EB owners don't generally switch pickups; some have used Seymour Duncans, but most tend to stick with the originals.
I'm getting used to the Sterling 4 single H now, and I have a Stingray H on the way. Takes a bit of finer technique for me to avoid buzzing on the frets.