New Hardware, Same Disconnects

I really wish Verizon Fios was available in my area (downtown Norfolk, Virginia), because for over 5 years I've dealt with frequent disconnects from Cox, spanning two separate apartments and a full generation of hardware upgrades and I'm still getting disconnects! I don't know what the issue is, but I'll tell you what it's not: anything on my end. I've had techs out multiple times checking the cable connection at the wall and they've all said the same thing, "it's fine." But never once was the line at the street checked, or any outdoor lines replaced. After recently upgrading both my modem (SB6121) and router (ASUS RT-N56U), I'm still disconnecting. I'm not even mad anymore; I've adapted. I've come to expect it. The disconnects have become ritual; the unplugging, waiting, and restarting. Yikes.

Reading the forums, this seems like a massive problem for Cox and I'm just waiting for the day when Fios is available in my area, because I know Cox will never resolve this issue. I'm not even going to bother calling Cox (again), because they'll just offer to send out another tech to check the wall line. Oh, well. Guess I'm screwed until there's another cable provider in my area...