Lately I've found iBlit to be great for basses (full on basses)!. Play with decay, sustain and release (have all of them pretty low to allow for many fast notes), maybe you'll even want to use a gate or something similar, to make it even clickier (depends on if you want it smooth or "d-d-d-d-d-d-d-d-d".
Tau is good too, use the glide time knob