I have a system with below components:

A: NAD 356BEE (all line-in, no optical/coaxial inputs) ~800
B: Marantz CD 6005 (optical out, analog out) ~600
C: Oppo HA-1 DAC (optical, analog ins, analog out, can be set as pure DAC, bypass amp as pre-amp) ~1200

How do I get best performance for PC and CD source music?

Option 1: PC+external hard drive -> USB B of HA1 ->analog to 356Bee line in.
CD 6005 -> analog to 356Bee.

Option 2: PC+external hard drive -> USB B of HA1 ->analog to 356Bee main in.
CD 6005 -> optical to HA1 -> analog to 356Bee main in.

Questions: which one is better theoretically? Is the HA1 DAC better than Marantz DAC so I could bypass CD DAC? Should I use HA1 as pre-amp and pure DAC bypassing its amp?

Any comments/suggestions are appreciated.