Using Contour With Replaytv

I have three Explorer 4240HDC non-dvr receivers, each connected to a Replaytv DVR with IR Blaster located in the living room, bedroom, and den. I can tune channels and record programs independently across rooms using the cable box and DVR within each room. For example, I can program the living room Replaytv to record Ch. 10 (PBS) at 11:00 pm today; the bedroom Replaytv to record Ch. 200 (HBO) at 2:00 pm tomorrow; and the den Replaytv to record Ch. 341 (BBC) at 10:00 am three days from now. I've been invited to replace my receivers with the newer Contour boxes. Phone conversation with Cox Support suggests, however, that the installation of a Contour Host box with two Client boxes would not support the independent tuning/recording functions I currently have. Consequently, I would like to know if the use of three separate Host boxes would work in this situation. My Replaytvs are coded for use with an Explorer/Cisco box, so I 'd like to know the specific non-dvr receiver model number(s) that might be applicable if this can be accomplished. I would also appreciate hearing about the experience of other Replaytv users with a specific Contour model. Which Contour box (I or 2) works best with Replaytv? Thanks for your consideration.