to the forums
Yes, you would be best to use your cable modem.
The Linksys router mentioned is a good solution and you can use it to send the wireless signal out around your house. Your cable modem will plug into this router.
Most of these routers have also ports for wired systems, and so you can hook up your PC that doesnt have wireless to it through wired cable and have wirelessly linked machines working at the same time too.