At $50/yr to lease a modem from Time Warner, and replacement modems at $50-$100, then leasing a modem from TWC would only be cheaper if Time Warner upgrades the

At $50/yr to lease a modem from Time Warner, and replacement modems at $50-$100, then leasing a modem from TWC would only be cheaper if Time Warner upgrades their network more than once every 1-2 years (which I'm betting they don't)