Its also a good idea to look/shop around for the best deal when buying any Adsl hardware dont just accept the first price you see.
Dont be put off if you find that the Adsl modem you have choosen has an inbult Router for the price your willing to spend as some Adsl/Router modems marry very well with stand alone Routers + some Adsl/Router modems have an internal option to turn off the Router side of the hardware.
If you decide to buy any Adsl hardware from Amazon its always good to use the
Cable Forum Link 