I had a static noise (slight.. not very bad) in the background on my Line 1. Voice quality was very good. But Line 2 did not have this problem. You might want to try the other port to see if it has the same problem too.. The same phone and cable would not have the problem on Line 2 for me. As soon as I pick up the phone and press a number, I will start hearing the static noise.

I was working with support and all of a sudden the static noise went away. I am not sure how it went away though. I still think my Line 1 port is little faulty. May be changing the wires few times fixed some loose contact.

I have Road Runner standard (7M down and 512K up) and it is very good.. I don't think you need to upgrade. If your voice is not breaking up then it has nothing to do with your ISP. You might want to try lowering the volume settings on the vPanel and see if it makes a difference.