Hmm, cool. I'll look into those. My current ones just don't sound 'dead' enough. They have a lot of strage sonic artifacts floating around each notes tone.
Dee Dee's sound was probably not what many bass fans were/are into and you're right, he probably played whatever was presented to him
Johnny's comment made me think about putting my Ibanez Lo-fi pedal in front of my amp to further dirty up the sound a bit.