USB direct or via. a reclocker?

Exactly, but you mentioned you prefer it on the same circuit as your HiFi gear. So having it on a different circuit in another room is fine, since it will be isolated by ethernet.

The FMC route is something to consider (I’ve done it with improvements) but I wouldn’t be surprised if the bigger improvement came from moving ROCK outside your listening room.

See below posts for reasons:

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and