@hayward_kong
I went with the Edge Router Lite. It seemed to have what I needed for a good price.
I understand your point about separate components. Easier to pinpoint what may or may not be broken when troubleshooting or even during initial ...
I am glad that I found this post. I want to say for all owners of the Lennar Connected Home (ICX 7150-c12p with the R510 APs), a lot of frustration can be avoided by realizing if you merely have a cable modem, you will probably need a router as well...