In the bay area, do look at sonic.net; there are real limitations to their last mile connectivity (ADSL line shared including in Remote Terminals, or ADSL2 from Central Offices, and a couple small Fiber installs), but they have very good connectivity once you get in.

I could rant about network neutrality... Comcast may not be (and probably isn't) doing anything to degrade Netflix's ability to stream to you; but they're probably also not making as many upgrades to peering or transit capacity as they could for that traffic.