In need of a new Fios hardware setup

Hey guys I am currently using a MI424WR-GEN3I router from Frontier and paying for 50 down 10 up. I am maxing out at maybe 20 on speed tests and at the lowest 1.2 . Is there a moden and router I could use that would work on fios. I tried calling them and asking for a list of routers that would work and everyone I talked to said we have never been asked that before we don't know. Do I need a DOCSIS 3.0 modem or a MOCA modem all I am using is internet.

I am looking at this ARRIS SurfBoard SB6183 DOCSIS 3.0 modem and wondering if it will work.

Also this router