Question about DVR: I was told at an electronics store that they are not carrying DVRs because they want people to rent those from cable companies. Is this true? It seems like a bad deal to pay the cable company $20 per month indefinitely ($240 per year!) in order to have a recording capability. That sounds like a rip off to me. Are there any alternatives? Amazon.com lists TiVo and some DVD players with recording capability. Anyone has experience with buying a DVR/TiVo/anything else instead of renting it from a cable company? I am seriously considering returning the DVR I just picked up from Cox cable and buy one from amazon.com. Any recommendations will be appreciated.