Hi guys, I have a Jackson RR5FR and it has two jb tb-4 pickups and I'm looking for a change. They sound pretty good as they are but if i drop down to even d standard then it just gets kind of mushy and no definition. I'm new to selecting pickups so would appreciate some help. I'm looking for one that has a tight bottom end but smooth highs, I really like the Dimarzio D activators that Chris Broderick uses but not sure how they would sound in Alder with a maple neck and rosewood fretboard. If anyone could help it would be greatly appreciated!