Well I'm sure your going to get 1001 replies, all suggesting someone different...but I use a Co. called Zen.
Came highly recommended by our business techie, always do well in the consumer tests, no contract (can cancel anytime).
We have been using them for 12 months now and we have had no trouble whatsoever during this period, when all and sundry around me using the usual (BT/Demon etc.) are crashing or hanging up like flies.
Their customer service/online support is great, and during the installation/set-up, their support and guidence was superb...all up and running without a hitch, not bad for a non-techie like me.
Checkout their website (
www.zen.co.uk), and pick the package that suits you. I too have a BT phoneline and run Sky digital. Can't recommend them highly enough.