THR22 Tivo is the old technology, but definitely not the other Tivo's like the Roamio for cable systems or OTA, I would suggest Genie since it's free when you sign up, Plus whatever second receiver is free, probably the Genie mini, If that's not what you want, then the HD DVR instead although it's $199 upfront, and $6 monthly fee for the additional receiver, First one it's free, If they don't need a DVR however for the second TV, then the mini client instead, since it's basically a tunerless client for the Genie HD DVR server, and it does everything a Genie do.
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