As a Now TV user, I'm getting tempted by their 'Combo' deals. (You can either pay a £50 installation fee and have no contract or get free installation if you agree to a contract). I particularly like the way that you can tailor the deal to your own requirements, by only paying for what you really want.
http://www.nowtv.com/broadband-and-tv
Yes, Plusnet belongs to BT - but is run quite separately. For example, phone Plusnet and you speak to a person in Yorkshire, not India and customer service is very good. (My service is John Lewis Phone and Broadband....which is provided by Plusnet. Trouble-free for several years.)