I recently bought a Scientific Atlanta dpc2100 modem off ebay to use in Columbus, GA with Knology. The seller sent me an email that said it's received several firmware updates since he stopped using it and he didn't want to sell me something that didn't work. I told him that Knology's site lists this modem in their compatible table and that I was comfortable to go ahead with the order. Am I going to regret that? I've been reading up on it, which I should've done first lol, and I was wondering if I will see a significant change in speed or connectivity from the Arris CM550a.