Motorola SB6183 SURFboard DOCSIS 3.0 Cable Modem for $112.82 shipped.  Here is a screenshot for reference.  It has IPv4 and IPv6 support and speed up to 686Mbps.  This is a relatively high-end consumer cable modem and is on the approved list of major cable ISPs.  Having your own cable modem often means you do not [...]