The easiest path forward is what @smatsui and @jaytor have suggested.
It allows you to stay with what you know and are comfortable with in the Aurender or if you choose to upgrade your Aurender NH100 in the future.
In my opinion, it does not add a layer of complexity. It is a natural pairing for the Denafrips. It brings overall upsides in sound quality and performance to the table, as well as the ability to optimize around the I2S input into the Terminator. It also gives you flexibility in Input/Outputs that you are, at present, not considering. If I recall correctly, it allows for an external clock should you be interested in adding one.
It allows you to stay with what you know and are comfortable with in the Aurender or if you choose to upgrade your Aurender NH100 in the future.
In my opinion, it does not add a layer of complexity. It is a natural pairing for the Denafrips. It brings overall upsides in sound quality and performance to the table, as well as the ability to optimize around the I2S input into the Terminator. It also gives you flexibility in Input/Outputs that you are, at present, not considering. If I recall correctly, it allows for an external clock should you be interested in adding one.