DAC connection to computer

Connect directly from the computer to the DAC via USB.  That’s a good place to start to get you up and running.  Separate DACs and streamers can increase the quality by a good measure but no need to start with that. 

Connect directly to the DAC by USB from the PC. Use Foobar2000 as the media player and use Foobar2000 Controller Pro on a phone as a remote to select tracks and play.

USB is flawed. Why would you go from fiber to usb? You’re going backwards.

All dacs in preamps/integrateds are compromised compared to quality standalone dacs. 
It’s funny when people say don’t hook up a computer directly to your dac but every streamer is a computer.

There is only 1 streamer that has a galvanized input/output, and I use it with i2s into my dac.

@rbstehno stand alone DAC is my preference also since it isolates the conversion from both the computer's and the amp's electronics but OP is asking specifically about connecting his PC to the DAC in his integrated amp.

Ah.

"A streamer is a computer."

A single use box is totally different than a general use PC.

Galvanized, fiber optics, sales gimmicks.