If you upgrade to speeds above 38Mbps, a Docsis 3 modem would be a must. Technically, 38Mbps is the fastest a Docsis 2 modem can handle. Even at lower speeds though, channel bonding with a Docsis 3 modem will get you better stability as far as constant speeds anytime and all the time and less dropped connections.
I just went through the same kind of process. Although my D2 SB5100 could handle the 18/2 plan I was on, my D3 Zoom 5341 does give me a constant and consistent connection all day and all night even though I have down graded to the 12/1 plan.--
The Firefox alternative.
»www.mozilla.org/projects/seamonk ··· amonkey/