Inductors make a MASSIVE difference in sound quality, as much as capacitors.
The Jantzen Wax Coils are dead silent and have a black background, and have amazing dynamics. Get the 12 gauge version...
I know this post is 5 years old, but I had to correct the record. And yes, the wax coils are a serious upgrade over the mundorf plastic coils. The plastic coils are noisy, they have a harsh ringing in comparison to the paper wax housing.