I just bought a new HD plasma TV and do not have cable or dish service. Everything I've read leads me to believe there is no way to use a TiVo HD DVR as a simple "upgrade" to my old stereo VCR. Is that correct? I see these new DVR's for sale at places like Best Buy for $299. Seems odd that it couldn't simply work as a way to record my favorite OTA HD programs. Also, a sales rep at TiVo told me there are periodic upgrades that I would need, otherwise the unit might unexpectedly "shut down and cease to function". A friend of mine also told me the life expectancy of the typical DVR is 3 to 4 years. Seems short for an electronic component. If all of this is true....I sure wouldn't want to spend 300 dollars. Seems there should be a market for "free TV watchers" like me. What am I missing here? Any and all info would be greatly appreciated. Feel free to email me directly as well. THANKS!