I don't have an DMR-E80, but have a Philips DVDR 985 and a Pioneer Elite DVR 7000. I record shows from both DirecTivo and ReplayTV to both of these players without a hitch (alibet the poor performance of the 985). Just connect up through the SVHS in, set the time parameters for the DVD disc (2 hours 2-1/2 hours, etc.) and let it record. I have the ability (and the time) to further edit the shows on the PC and re-record back to DVD (in case of removing commercials, etc.).
I've been doing this for well over one year now, with no complaints. For those few TV shows in excess of three hours the quality of the DVD produced on either platform suffers.
Hope this helps.