If you’re wanting versatility, this is the de-esser for you.
The applications for the Eiosis E² go far beyond just vocal sibilance. They have several different algorithms to target voiceovers, guitar string squeaks, cymbals, and even mastering. The most creative part of the E² is what it compresses. You can create your own EQ curve, so that if the de-esser is triggered, several different frequencies are brought down by different amounts.
It’s extremely powerful if you’re looking for total control.
Original Recording:
With Eiosis E²: