David, I am in the same situation right now. I just bought that modem from Costco and I am deciding if I should replace my other one. Paying for Premier service and just not sure I actually need to. The biggest strain on bandwidth around my house is Netflix, other than that it is pretty typical music streaming/web surfing sort of stuff with no more than two to three concurrent users. If I were to drop to the Preferred level I would pay for that modem in 2.5 months of savings. Running the Auto Speed tests now to help with my decision. Due to Costco's return policy I will probably install it and return it if there is no major difference.
