Happy to be able to help.
Whatever ADSL router you go for, you will probably have to contact your ISP and ask them for user name and password and they may ask you to enter a few settings. 
This is quite easy and enables the new modem built into the router to connect properly.
Edit:
This info may be useful to you explaining what you can use. Just a quick guide....
http://www.talktalk.co.uk/talktalk/s...showFAQ=WNLIST
And also this:
http://www.talktalk.co.uk/talktalk/s...howFAQ=WNSETUP