You shouldn't have to rely on their router. You simply place it into bridge mode, so that it works only as a modem and use your router as before plugged directly into the "modem".
I guess I have been mis-reading some past posts.
Right now I have a Cogeco wired modem with my own router connected to it, as well as my telephone land line. Are you saying that if I switch from my Pace PVR to TIVO, none of this will change? I know it involves a service call to make the switch, but the new PVR and minis would use the same wiring as my Pace PVR and HD receivers?