Best broadband offer for a BT line?

[spaced]

I have a standard BT Line. Unfortunately BT do not offer unlimited broadband. Who offers the best offer, which I can attach to my BT line? Thus no need for line swapping etc, just quick intallation of software and broadband modem

Ta

[kazza55]

We've got one of those bundles with Onetel that give you unlimited broadband plus all our local and national phone calls are included in the price. (29.99 monthly).
We still have to pay BT the line rental, although we could get it very slightly cheaper with Onetel.
This bundle suits us very well as we have a teenager (nearly always on the phone!), so no nasty suprise phone bills, and we use the internet most days for several hours a day, every day.
The only disadvantages are that that we only seem to have one email account with Onetel and there are no parental controls that you get with AOL.