I've got an American Jazz 5 string and I'm considering these two Barts. I love the way my Jazz plays but to me the sound is a bit compressed and I want some pickups with a broader frequency range...slightly hi-fi sounding. I know the Barts have some growl and are a bit "dark" and I want to try them. How do the J1 and CBJD compare? The CB is "classic bass". Does that mean the J1 is more modern sounding? Any help on how these compare would be appreciated!