Home wifi build

Hey guys thanks for looking. I have some builds and I'm looking for advice.

I have TimeWarner 300mb plan. I will be buying my own modem and seperate wifi router. What class of modem and wifi router do I need to get the most out of the TW 300 plan? Google fiber will be years away for me.

I see the best modems from TW list of approved modems. There's the Arris SB6190 and Netgear CM600.

What wifi router should I get a basic 1900, or go nuts with a AC 5300 class?

Devices: 3 smart phones, 2...

Home wifi build