If you are looking to upgrade your DOCSIS 3.0 modem, the ARRIS SB8200 DOCSIS 3.1 modem is one of the best choices you can make.

The SB6183 has a Broadcom chipset (I boned up in the OP and mixed the modems up ), and the SB8200 also uses a Broadcom chip (albiet DOCSIS 3.1, the earlier modems are DOCSIS 3.0).

So, here's something you may want to know when upgrading to an SB8200. Apparently, this may not affect all hardware/firmware versions, but it bit the hell out of me. Replaced my modem last night ...

According to the release, the ARRIS SurfBoard SB8200 is a DOCSIS 3.1 ready modem featuring 32 download and 8 upload SC-QAM channels along with 2 download OFDM and 2 Upload OFDMA channels.

Download speeds for Internet 300 will move to 400 Mbps, a 33% increase. In addition, Mediacom will be doubling the download speeds for the Connect2Compete Plus (C2C+) tier from 50 Mbps to 100 Mbps.