This is for a fretless Squier Jazz. Basically, I've had enough of the burping bridge pickup, and want something that is better at supporting a band mix. So I'd like something with more of that really full, growly low end that you hear coming from a lot of humbuckers. The DiMarzio Model J is the only one I know to really enhance your low end, and I know the Ultra Jazzes, while humbucking, are still quite Jazz-like, so I'll have none of them. I know nothing about Duncans, Nordies, Barts, or others. Suggestions?