i have a bkp p91 (aIV) in the bridge right now and its a little too smooth/lacking low end and doesnt really keep up well with the neck pickup (yes. i have played with the height). what should i put in there? im thinking either a supermassive. i have heard it saind that with sg's pickups that fall withing the medium-hot output levels are often underwhelming. does that hold true to p90s as well as 'buckers?