BlueSound Vault to Arcam SA20 best cable

Hey. My Denon 2000 PMA-r just went half dead. I was using it for my turntable and Bluesound Vault exclusively, so 2-channel only.

Since my Denon became temporarily unusable, I bought an Arcam SA20 and want to know if you have a strong opinion regarding the connection from the Bluesound Vault to the Arcam integrated. I'm assuming that the Arcam DAC is high quality, but still would like to hear some personal opinions on RCA vs. coax vs. optical cabling.

Thanks!