One thing the Obi 110 has over all the others is the capability to properly interface with your "standard" telephone line from AT&T, Verizon, or whoever. This is not a plus for you if you plan to completely dump your home line. But if you would like to keep it for backup, 2nd line, local calls, etc the Obi is the only device that works correctly for either purpose. The Cisco/Linksys 3102 has a line port but the firmware hasn't been updated in over 3 years and there is bad echo when you use the "home" line. The Obi is much less susceptible to this and with a little fiddling with the settings you can eliminate it almost completely.