Demon rocks.
I have been on Blueyonder with NTL and BT Broadband. Neither touches Demon
http://www.demon.net/adsl/consumer.html
Its £25 a month. Buy your own Modem and microfilter for £40 and you are off. Their technical support helpline is simply faultless.
In addition - and here is the killer punch - they give you a static IP address.
Which is obviously a useful thing.
WWW