I've got two Series 2 TiVos -- a 200 hour AT&T that TiVo throws a fit about every time I have to call in (I didn't hack it, I bought it that way from DigitalResearch.TV, now defunct) and a TiVo-branded 80-hour. I also have one of the original 14-hour Phillips Series 1 units. I've been thinking about upgrading all of them, but have some questions I hope you guys can answer: I keep seeing something about a 137GB limit per dirve, but I thought the AT&T drive was bigger than that when I bought it (haven't looked yet); is that limit old info? I presume there is room in all three for dual drives (all currently single), but does the OS have to be on both or do they function as a RAID or what? Would it be better to eBay the Series 1, then use the money to buy a used Series II and bigger HD for it? If I do the latter, does my lifetime subscription stay with me or go with the old Series 1? Sorry about the laundry list, but thought that might be less complicated than individual messages, since they are kinda tied together. Thanks, J.R.