Router for Audio Streaming

I wouldnt worry too much about the router as its being fed noise from all over your network. I would concentrate on isolating your streamer/hifi from the network, first with a dedicated switch ideally with an uprated quiet PSU. This will act as buffer reclocking and transmitting a fresh signal, removing a large amount of the high frequency interference from the ethernet signal, from there run the best ethernet cable you can afford to the streamer. You can also add a passive filter in here which would clean up the signal before you reach streamer.

Router > Standard ethernet cable > Switch with quiet psu > your best ethernet cable > Passive ethernet filter > Streamer 

You can upgrade the router too, but anything happening before the switch is likely to have far more subtle effect on SQ.  I would add a simple switch D-link DGS105 with an ifi ipower PSU, both can be bought and returned from amazon for $70 and this should give you a noticeable improvement on its own, or atleast is very good risk-free way of experimenting and see if you like the results.

@yoramguy1 it'll be interesting to hear how you get on but i'm still a bit puzzled why you're focusing so much attention on the Router as a solution. Will your router still be connected to lots of other devices on the network? or are you planning to use if exclusively for your Streaming set up, eg, with ethernet coming in and one cable going out to the streamer.

@yoramguy1 apologies I missed that and I thought you were looking to explore how  you could improve SQ. if you’re streaming via Wi-Fi any, even basic routers will be fine. :)