Note that DirecTV will not activate any used equipment when you first open your account. However, once you've set up your account and have activated new receivers on it you can add more equipment later, whether it be new or used. A series 2 DirecTivo will give you the best bang for your buck with DirecTV and it will be cheaper than the fees you've beeen paying to use your old Tivo with Comcast. The cost savings increases as you add more DTivos because there's only a flat $5.99 DVR fee with DTV rather than a separate subscription for each individual Tivo. You will have to pay the $4.99 mirroring fee for each DTivo but that's pretty cheap in comparison.