I currently have a TiVo Premiere with lifetime and I'm looking to get my dad a new TiVo. I don't know if I should go with the Bolt or Edge. He wants a minimum of 1TB, 4 turners. T4 is not an issue for me since we have a bolt in the Den and have gotten use to it. I know it's to soon but which TiVo is more reliable? Does TiVo allow you to transfer a lifetime subscription from an older Tivo to a newer one and if so how much would that cost?