With AT&T, the elite is $19.99/mo for 12 months if you bundle home phone service (without home phone is $34.95 for 6 months and then $48 after the 6 months is up). After that, you should be able to call and renew at the new subscriber rate, but usually it is forcing you into another 12 month contract. I have done that the past two years no problem.
As far as service reliability I have issues with my modem flashing an orange middle light in which the internet has briefly gone out. After 15-30 seconds it works again, but then shortly thereafter does it again. I don't know if this is a service issue or a modem issue. The modem is about 5 years old and possibly more. I can't remember if I brought it with me in the move or not.
Also, the bandwidth cap is 150GB for AT&T. I checked my usage and I only use 10-12/month, so unless you stream all the time, that shouldn't be an issue.
If you're not going to have a home phone, I think I would go TWC because I think you could probably get faster speed for the $48/mo once the special rate runs out.
[This message has been edited by khkman22 (edited 9/17/2012 4:48p).]