I think that you'll find 3Mb/ps to work just fine.
I think that I've had the 3 Mb/ps service up here in Westwood, CA since about 2002. I didn't think that I needed the 6 Mb/ps service. This has been working just fine for finding info, email, general surfing and I have a NetTalk device attached to it that provides good outgoing and incoming phone service 24/7. I've had no problem with streaming movies and other material from Netflix, Hulu Plus or Crackle. I have a Roku device connected to my TV that connects (wireless) to Digitalpath (24/7) and I find that it has a better selection of entertainment than either sattelite or cable has and at just a fraction of the price of either one of them.