About to give up! SBG6580 service issues

If Cox paid me a nickel for every time my brand new Motorola SBG6580 gets dropped, I'd buy the company and fix the problem!

We've had 'tech' people out here several times recently. Finally, after the third visit, we were convinced by the tech's that our modem/router was the problem. So, we went out and bought another SBG6580. The drops occur regardless of which type of connection, wired or wireless.

The new modem/router is less than 2 months old and, once again, were experiencing random drops" Frequently, sometimes as soon as I reboot the modem.

This needs to be corrected. I don't care if a tech has to go under the house to run new lines. I want this fixed ASAP.