I'm considering dumping the Comcast DVR and going to Tivo as my primary unit. (I have recently obtained an older Series 2 in the garage, so I'm familiar with Tivo's capabilities.) There is an offer to upgrade to a Factory Renewed Premiere XL for $149 plus 399 for the MSD lifetime. Is it worth it to buy lifetime for an older renewed XL? Also, how happy are you all with Tivo as a company and their support? Thank you!