You might consider the Denafrips Gaia that has a USB input and an I2S output. I think it reclocks using a OCXO clock for improved jitter performance.
I also have a N100H and I bought something similiar to the Gaia, a Innuos Phoenix USB reclocker that also has an OCXO clock and a Sean Jacobs linear power supply. The Gaia might have been a better route for me too but at the time, I was using a Bryston BDA-3 DAC that doesn’t have an I2S input. Since then, I sold the Bryston and upgraded to the Holo May KTE. The May has two I2S inputs so I could have benefited from the Gaia I2S output. The Phoenix USB relocker was a nice improvement to the N100H. If I were you, I would look into the Gaia.
I also have a N100H and I bought something similiar to the Gaia, a Innuos Phoenix USB reclocker that also has an OCXO clock and a Sean Jacobs linear power supply. The Gaia might have been a better route for me too but at the time, I was using a Bryston BDA-3 DAC that doesn’t have an I2S input. Since then, I sold the Bryston and upgraded to the Holo May KTE. The May has two I2S inputs so I could have benefited from the Gaia I2S output. The Phoenix USB relocker was a nice improvement to the N100H. If I were you, I would look into the Gaia.