Hey there! I have a CIJ Jaguar bass. I've had it for a long time, but I finally pinpointed that there's just some underlying characteristics with the preamp and pickups that I can't make up for. I've decided to replace them, and I've come down to the Dimarzio model Js and the Nordstrand NJ4s (But I'm unsure if I should go for the SV or SE Split coils?) I also am looking at the 2B Nordstrand preamp as a replacement. Anyone have any other suggestions? Maybe in particular the preamp as I have not as much experience with different preamps and such! Also, I'm unsure if I'd need the splitcoils and if it will affect the series/parallel wiring options in the Jaguar bass. Thanks!