Okay, this is basicly something that probably doesn't make sence, since musicians play with the instruments and amps they like. But in my opion, some bass players should upgrade their stuff to make some better hearable basslines, playing live.. For my taste, Oliver Riedel (Rammstein) should upgrade his Sandberg California PM basses. He uses 5 of them, but they are all passive. Since he is a pick player primairly, I think he should get active basses. His signature model (Sandberg Terrabass) was active and had a better response and sound when he played live (in my opion ) So, is there a bass player that you would like to have his gear upgraded to get a better sound?