Sounds good, the last one was the rythym circuit was'nt it?
For clean playing the stock set up is as good as most other guitars really, it would obviously improve things to put more expensive pickups in there but it is'nt that necessary (for clean playing).
If you go on the seymour duncan website there are sound samples of the Jaguar pickups and on the webrocker Jaguar website there are sound samples of vintage and CIJ Jaguars. If you give them a listen it may help you decide if a pickup change is worthwhile to you.
The common complaints with Jaguars begin when you start to use gain/distortion. The pickups are'nt wax potted so microphonic feedback becomes a problem especially on the bridge pickup.
If you feel the rythym circuit is useless to you you could try different value caps or even onboard micro FX.