If you are still not convinced of better speeds and higher reliability of broadband, you'd better read some of the broadband guides which can provide lots of information. For example:
http://www.broadbandsuppliers.co.uk/...nd-basics.html
If your budget restricts you to choose cheap broadband packages, please see whether following link helps you to find the cheapest broadband deal in the UK.
http://www.broadbandsuppliers.co.uk/...nd-uk-isp.html
ISPs like Eclipse and Demon also provide reliable dial-up services, in case you are in search of better dial-up service provider.