Pro on Plusnet is awesome; the best service I've had at home, or in fact anywhere. I'm sure you can get cheaper broadband, but I haven't found anyone that gives more real-world speed.
For example my mate has Infinity at his house, which in theory is much much faster. But if you try to use iplayer or download stuff at 7-8Pm the service is very slow. Plus he gets random packet loss and drops in service.
It's all about traffic shaping...