I've got a sunburst standard MIM jazz bass I bought used, and put the Fender Noiseless pick-ups into. I like the way it sounds but it being all passive, I want to put a preamp in for when I have to plug direct into a PA, most likely a J-retro if I go for it. Right now I've got the pickguard off so someone can customise it. I might just buy a shell pickguard for the vintage look, though. My point is I was wondering if people have ideas or opinions about things I should put money into, or shouldn't have put money into. I'm looking for a mainly rock sound, but I also like jazz and am considering taking up slap and I play primarily fingerstyle right now. Thanks in advance for any input!