Directv and Roamio tivo

I would love to get the programming that directv has locally but I have three TIVO dvr's. A series 2 and series 3 HD and a new 4 channel Roamio with a large hardrive. Can I get Directv and just use their receiver to feed the Roamio and the others or do I have to get the directv DVR version of Tivo?