When I bought my Fender MIM Jazz Bass, it came, of course, with the stock pickups which were not bad at all, but I felt they lacked personality.
I decided to buy these DiMarzio Relentless pickups after watching a review from Tanya O'Callaghan (base player with Dee Snider, Whitesnake and Bruce Dickinson, amongst others). She personally endorses these pickups and... boy is she right to do so. By comparison with the Fender stock pickups is... night vs day. The have powerfull personality, punchness, roundness and are way above any Jazz Bass pickups I hed.
I fully and wholeheartedly recommend them.
Oh, they are TOTALY SILENT! No buzz, no hum, absolutely no unwanted noise. The price is not quite low, but they are worth every penny.
If you have a Jazz bass and want to improve it, these pickups can be real improvement to any stock pickups that came with your bass.