Hello all, Guess I'm gonna be the latest guy to throw Bartolini under the bus, here. Just picked up an Ibanez SR500, and to be honest, I just gotta get those pickups outta there.. Since I'm such a fan of how the Nordstrand J pups sound in one of my jazzes, I'm looking at replacing with Nordstrand Big Splits for the Ibby. As far as the preamp though, I don't really know. The bass has 5 total knobs and 1 switch. I see alot of positive comments about the Ag OPB-3, but I thought I'd get some opinions here. p.s. as far as desired tones, of course I'm looking for a different sound than my jazz basses, and something that is very responsive to harmonics. Thanks in advance.