Welcome to TalkBass Amiel.
Two of the most useful features of this site are the search function and the "Stickys." At the top of each section are a few threads that have so much good info that they were made into Stickys so they could be easily referenced. In the Pickups & Electronics section there is a comparison of numerous jazz pickups. A search will also turn up tons of good info on potentiometers, capacitors, etc. In the Hardware section there are several discussions on bridges.
Since it all comes down to player preference there is no definitive "best" pickup, bridge, potentiometer, etc. It's important that you read as many opinions as you can, ask specific questions, and then choose what you think best fits your needs.
Originally Posted by bradjonesbass
Study what Pino does and do that! WWPD?
"Bob Babbitt changed the world with 4 strings and a groove." -Dave Pomeroy