Ignore the bs about the ps audio ds dac mk1, the guy doesn’t know what he is talking about. He also doesn’t know that the airlens with i2s makes the ds sr dac sound better. He probably uses usb which is the worst sounding interface to use, the OP is doing it right by using i2s. Also, streaming is here to say, I sold my $15k tt setup with all my vinyl years ago when you do streaming right, it just sounds better. You also don’t need fiber optic converters. There is a simple trick to get your internal network sounding better for just a few bucks.
OP, send me a PM and I’ll help you. I’ve been streaming for 20 years, ex network guy, it’s very easy to setup. It doesn’t matter which router you use, which network you have, copper or fiber.