I own an Ibanez GSR200 ( http://www.musiciansfriend.com/product/Bass/Electric?sku=519524 ) and have been scanning and searching ebay and other online music stores for another bass. But with money problems and some other things, Ive thought about just upgrading my pups. My main question is, is it a good idea to just replace the J pups and not the P pup or should I toss in the extra $50 or so and replace both? I will prob. be switching to DiMarzio Jazz pickups but havent done any research on new Ps Thanks yall!