I'm thinking about changing my passive EMG-HZ pups on my Spector NS20004, but I have no idea what to change them to. I think the tone is quite thin. I'd like some more middle added to the tone. I've tried the warwicks alot and love their tone. Is it possible to make the tone more like that, or is the only way to buy one (I'm thinking of doing that anyway...)? How much will changing pups alter the sound? What pickups do you recomend? Tanks!