You will need a cable/dsl router not a adsl modem router thats the first thing to be sure about (as long as you are sure it is cable broadband
)
linksys now owned by cisco have always served me well enough
Link to follow
http://www.ebuyer.com/product/103185
there are plenty of cheaper routers available. Does your laptop have a G or N wireless adapter?
http://www.ebuyer.com/product/131028 This Buffalo N class router seems very well priced will work with G also