when you put the shub into modem mode it loses its routing fuctionality and wireless capabilities so it needs to be directly connection to your router, just like you have to have your main phone at home directly connected to the RJ11 socket in the wall and then you can have cordless phones dotted around the house.
Here is a link for a recent thread discussing routers
http://www.cableforum.co.uk/board/12...endations.html
Go for Linksys
