Quoted from Rdoyle1978:

First, I would
Implore you to really really be sure you can’t run hardline. It is potentially 1,000 times faster, and will have way more capacity to handle faster speeds if US broadband ever catches up to the rest of the world.
That said, this is the best router you can buy in the US:
https://www.bestbuy.com/site/asus-ac5300-tri-band-wireless-ac-gigabit-router-black/5008900.p?skuId=5008900&ref=212&loc=1&ksid=e31483a6-3621-4914-ae1a-dc8546107e74&ksprof_id=401&ksaffcode=pg257723&ksdevice=m&lsft=ref:212,loc:2&gclid=EAIaIQobChMIhOWkrqjl2QIVBqZpCh1OagqMEAQYASABEgIRRPD_BwE
It’s $349, usually on sale for $300 or so
But that’s a bit overkill. This is the one I use:
amazon.com link »
We have 8 servers in the house, 2 desktops, 14 laptops and I think 11 pad/phone/other wireless devices. Yes my work requires me to learn way too much about this stuff.
Buy the router first, then if you really want to try AppleTV, think about a used one. But upgrade your router first.