I get 2Mbps unlimited download with business-quality support from Pipex. They then give you a capped 10GB download capacity to their newsgroup servers, and charge £2 per 5GB extra. They also throttle the newsgroup download speed to about 750Kbps until you pay the extra, then you can run flat-out. The retention is almost as good as the so-called 'Premium' newsgroup services, which you would pay a lot more for.
Pipex also provide 50Mb high-quality webspace (which I use) and all the other usual stuff.
For this I pay £34 a month (plus any extra newsgroup capacity I buy). I think that's pretty good value, but if anyone can recommend anything better, I'll have a serious look at it.
The newsgroup access is essential to me. I use it more than any other web service.