Signed up for preferred but only getting 32Mpbs

Hi,

I'm a preferred internet customer and I upgraded my modem to a new Motorola SB6141 to take advantage of the 50Mbps download. Since day 1 speed tests consistently show 32Mbps download and 3-4Mbps upload. I called support and had a tech come out, he said the signal was fine and blamed my router. I'm now plugged directly into the modem and I'm still getting exactly the same speed. I've tried several different Widows 7 laptops and a Windows 7 pc and I'm getting the same 32Mbps download speeds.

Does anybody have any idea how I can get the speeds I'm paying for? I was considering upgrading to premier but don't know if its worth it if I can only get 32Mbps with the preferred.