Thunder'Mag is supposed to be the brightest, that's why I would choose those. I need a lot of treble in my bass and I have a hard time getting that without the G string becoming harsh and distorted. So lower output would probably be beneficial for that.Just an FYI, the TV Jones ThunderMag pickups have the least output [but still great tone] of all the TV Jones bass pickups. If you want output go with the ThunderBlades.
I really can't afford them, though. I'm hoping the Filter'Trons will work for me, but I'm having a hard time finding any info/feedback on them.