Huh? Who's talking about a speed increase? I sure haven't mentioned it. As Shark has pointed out, the M1000 I currently have is known for having issues with line noise. I want better resistance to line noise, which is why I'm looking at a new modem.
(Oh, and what's at 3500' that makes me think there's a DSLAM? The brick building that says CenturyLink on the side, which I recall is where the last tech said it was.)