La Bella's it is. I do recall some moons ago using d addario black nylons when I was in a Beatles funk although I had a bad experience with the d addario and was not using proper technique or knew the foam under the bridge 
Now that I've been taking my bass playing more seriously I will definitely try out the foam trick and will absolutely try the La Bella blacks
Now that I've been taking my bass playing more seriously I will definitely try out the foam trick and will absolutely try the La Bella blacks