Some stupid questions from an occasional TV watcher. I'm trying to decide between these models. Most of the differences I don't care about... the one of concern is streaming. What is the difference between TiVo streaming found in the Roamio vs. the Roamio Plus. Right now, I rarely use services such as netflix, hulu, etc., but who knows what the future holds. The only other concern is hard disk size. I rarely get past 75% full on my Premier, so I'm not overly concerned with having a bigger drive. The only reason I'm even thinking about upgrading is because my Premier is starting to act flakey and I think it's on its way out (it's 2 or 3 years old). Also, it seems only a few places are selling the devices and they're all advertised at list. TiVo offered me the Roamio for $150. Can I do better elsewhere? Thanks.