Modem router combo

[Danielminyard01]

I’m purchasing my own modem /router combo for a 600 mbps instead of renting. Is there a good one at a good price recommended?

[EG]

Start by looking here for models that are approved by Comcast for you speed tier;

https://www.xfinity.com/support/devices/#auth

[royguti]

That's where I looked when I got my 300mbps service, got the motorola modem/router MG7550, supposed to handle up to 686mpbs, modem installed getting about 1/3 of the speed, installer says it's because it's 16x4 channel instead of 32x4 which halfs my speed. I'm about to go replace this model but why would they put it on the list if it can't handle the speed?