Many electronic devices, but weak Wi-Fi modem. What should i do?

As i mentioned at home we have 2 iPads, 2 smart TVs, Apple TV, PS3, Macbook, PC, Laptop, 3 iPhones etc… So many electronic devieces in a small house. And we're connecting to internet with 20 mbps fiber. We're using the modem our ISP gave. And when we connected to internet, as you can imagine, it's crashes. So should i buy a new modem or router? If that so, could you suggest some modems/router/gateway for gaming and media streaming. At least 2 iPads, Macbook, Apple TV and specially PC should be connected to internet nearly all the time we're home. PC is more online gaming so it should be a low latency hardware that it could prevent lags.

You should be just fine with a brand new router. I'd recommend checking up on linksys brand of routers and finding the right type of router you need.

Get Google Fiber if it's available in your loaclity.
you will 1000 mbps download speed…

The router portion of modems are not very good, when I had that problem I got a duo channel router and had the modem function turned off as it conflicted with the router. Once I did that it fixed the issue. I also have many Wi-Fi devices so that's similar to your issue.

Net gear and Linsey's are both good routers with great tech support.