I am currently with zen and am very happy with the broadband service, however there is a 20gb cap and it costs me £1 per gb over and as I download a lot of linux distros and use the internet constantly for my work I hit and exceed that limit regularly.
I am ideally after a 50gb or unlimited account, but it needs to be reliable - very reliable. I also have a static IP so that would be nice too (though not essential) and they need to offer std rate telephone support in the event that I need to speak to them!
Tall orders eh! I currently Pay £24.99 inc vat + £1 per excess gb.
Obviously do not need modem/router as I have that - though would not be turning away a freebie!