I just picked up a MIJ Fender Jazz bass off eBay. It's my first fretless and it's got passive electronics. To you fretless players out there. What kind of electronics do you prefer, passive or active? Please tell me why you like your preference. Also, from communicating with the seller, it's a stock bass with a rosewood board. I'm into jazz, R&B, funk, classic rock and blues. Would anyone recommend upgrading this bass? If so, can you provide some suggestions that I should consider? You know like bridges, strings, preamps, pickups, etc. Thanks for the help.