Tor Relay connections problem

I have been running a 4.6.10 relay in Ubuntu for over a year. I have a good ISP connection but I cant use as much BW as I want to assign to it. I really think I need a better router. At about 4500 port connections my router gives up. Can anyone recommend a good Tor router with wi-fi (Tor PC connects via wire). I have tried two different routers that I had but I need an upgrade anyway. I am in the US Florida on Spectrum.

Thanks!

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