I had the DiMarzios, and they were really quiet ( as regards noise), and really nice. Slightly oversized, so I had to chisel the routings a couple of mm's to slot them in.
Some people have reported that these don't have as mush 'bite' as other replacement pups, so that might be a good thing for you, can't say I noticed all that much of a drop in the punch of my bass, but ti did sound an awful lot better than the stock squier pups.
HTH.