There are many excellent ReferenceR2R dacs out there in the $6k range from
Denafrips as well as Holo Springs , and delta sigma dacs like the Excellent T+A 200 dac. You possible May get 2-3% better possibly at $13k that extra $7k
can be better spent on a very good Ethernet hub, Ethernet,and or usb cables
and as I always state Any wall wart to your router or elsewhere is adding noise to your system get rid of it ,the LSA audio - LPS power supply is by far the best unit under $1200 on Audiogon $700 and has a excellent DC cable most charge $150 for look on your power supply most are 12v ,the LSA can ramp up to 8 amps
router- modem combo around 4 amps.