i want to change my 5 years old SpeedTouch 510 modem http://www.thinkbroadband.com/hardware/reviews/14-st510v4.html to APE http://www.apple.com/airportextreme/specs.html i'm confused.they do have similar ports but i read somewhere that i need a modem with the APE? my question: will the APE be a great substitute for the SpeedTouch 510 modem? VS. ? P.S. i have a DSL connection.