Looking for a PVR with editing features

I’m looking to get some sort of PVR (like TiVO or Replay TV) that will allow me to record & pause live TV, but was wondering if any of them also allow you to dump stuff off to their hard drive from an external source and then edit it. I want to dump some home video footage off and then edit out the stuff I don’t want. I had a Panansonic DVR that allowed me to do this, but it didn’t really allow me to pause live TV like TiVO. Is there such a PVR available with these editing features? If so, which ones?