I have a 622 that I have leased for 7 years. I just got a new TV and am considering if it is time to "upgrade" my DVR. I only have one TV and have no plans to add another. I have two issues with the 622 that drives me nuts and wonder if a new model would rectify. First, the speed at which the unit changes channels is very slow. Used to be when I had Comcast cable, I could flip through channels with blazing speed and would often channel surf. With the 622, it is so slow, I never flip through the channels. Second, I can find no way to Delete Favorite Lists that are no longer being used. Would a newer model DVR solve those issues? Do any of the newer models have additional features that offer significant benefits? What is the likelihood that I can update at no charge? If there is a charge how much should I expect it to be? Thanks for the help.