buy cable and dsl. loadbalance then with a dual-wan firewall like pfsense, zeroshell, etc. you get double the bandwidth and increased speed. best of all, redundancy.
i don't have cable tv or a regular phone line. if the internet goes down, it's time to bust out a news paper or something.
yeah it costs more, but then next time your ISP has an outage, if you wouldn't mind paying another $50 to be online right now it's worth it.