Pipex is a first class service in my experience.
However, there is a consideration.
If your motherboard has a VIA chipset, there are known problems with the Alcatel drivers. However, with Pipex, you can choose to select a modem of your own choice (which is the option I took and it works fine).
Whether you can deal with this, depends upon you experience level, but I would certainly look at the site below, for a cheaper and more efficient alternative modem.
For one telephone, all this modem needs is an adaptor that can be supplied by the same company.
http://www.solwise.co.uk/adsl-pci.htm