[PLUG] Xfinity cable modem suggestions?

[jgw at sdf.org]

Hey - Got fed up with CenturyLink's crappy service and signed up for
Comcast/Xfinity 10Mbps service.  I need to buy a modem and was looking
for suggestions.  I would be maintaining a LAN behind a router of
some sort so a modem/router combo unit might be the better option,
ideally with WiFi.

Jeff