Input output cable question

Hi Bill - for the most part, with Aurender, the AES/EBU should give you better performance.  If in doubt, try borrowing one from The Cable Company and determine for yourself.

I have a Aurender W20SE and the output of the AES is subtly better… keeping the quality of the interconnect the same. 

Should be a little bit better sound quality and the connector itself is much beefier and snaps in and locks.  Worth it just for that...

Any hints of what I should get for a cable?  Favorites?

I see pricing from $200 to $6000.

I love to buy used expensive cables for more than 1/2off. 

Just a personal preference, but I like and use:

Grover Huffman   https://www.groverhuffman.com/ex

Wireworld   https://wireworldcable.com/collections/balanced-digital-audio-cable