For what its worth, I skipped over the T1 route and went with business class cable very early on, it'll perform better than the home cable (business class usually gets their own nodes, so they're more lightly loaded with an SLA) - and the cost is minimal, I have a 400/20 circuit from Spectrum for about 200 a month, including 16 routed IP's.
You'll have to call their business class phone number, I've done this with spectrum and comcast before. ISTR, you're in socal somewhere, so I'm not sure who.
Up until your post I pretty much had forgotten about T1,T2, Tx lines and how much I wanted one back in the day.
I did not understand why you had to get a different cable line for Netflix etc.? The speed of the like couldn’t have been an issue?
It's really nice that people know how to do things like this AND share the knowledge. Thanks, and we're all looking forward to chapter 2 on this one!