I installed a set of G&L U.S. MFD SB1 pick ups in my my P bass build. No additional routing required to body or pickguard, they dropped right in and give me the sound that I loved in my SB1 but in a lighter weight instrument.
I'm a fan of the NYXLs, well worth the cost, the set on my gigging bass have been on there for over a year and still sound fresh.
I've recommended them to a number of my bass playing customers, who all seem to love them.