Router Recommendation to Future Proof for 4k Streaming?

I want to replace my default Comcast gateway with a router/modem combo. I've searched around on Amazon and read some top 10 lists but am having trouble noticing the differences between The very expensive $300 plus routers vs something between $150-$200.

It would support a small family with 10-15 devices between phones, computers, ipads and game consoles.

The main uses in the house will be for Online gaming and video streaming. If possible I'd like to future proof myself for 4k streaming even though I don't have a 4k TV yet.

Thanks in advance!