Just looking for some opinions about upgrading a 2002 Fender American Deluxe Active Jazz bass. I love the feel of this bass and its nice and lightweight, but i'm wondering if it could sound better with different pickups and a new onboard preamp. The current pickups are 2 Dual-Coil Ceramic Noiseless Jazz Bass Pickups with Nickel Plated Pole Pieces. I was thinking about some Aguilar pickups, more specifically the AG 4J Humcancelling pickups. I've also played and like Fralin pickups... For the preamp I was thinking of adding a Sadowsky on board preamp. Just wondering if these would be significant upgrades/worth it and if anyone has any experience with a similar Fender and/or these upgrades. Thanks!