I use OpenDNS servers (188.8.131.52 & 184.108.40.206) and rarely have issues w/ them. As a Business class consumer, are you required to use a coax connection or can use use ethernet from the the ONT. If you can switch to cat5e, i would do so and use my own router. I currently have the 15/5 residential speed tier via cat5e and the Netgear WNR3500L(SamKnows) gigabit router. I get the following average speeds consistently on my connection.