I went with Plusnet for a few reasons. Though they do have a few cons to go with the pros as well.
A: 120GB peak allowance - plenty for me, equates to 4GB a day, and most days im at work, all my downloading is done overnight anyway.
B: Honest about shaping - Unlike other ISPs with vague FUPs, Plusnet come clean with what you should expect from your connection, with regards to speed at certain times of the day via certain protocols.
C: The ability to disable shaping altogether - Something Infinity does not have, an extra £5 a month to Plusnet, and there is no shaping, end of. Even with the extra £5, it only takes the monthly fee up to £26.49 for 120GB peak usage (8am-midnight) and absolutely unlimited off-peak. I did close to 1TB last month off-peak and I didn't even have to try that hard.
D: Option of a Static IP - I'm not sure if Infinity has this option, but I didn't think so.
A: The 120GB peak time allowance counts upload traffic as well, not a major problem for me, but for other people that upload lots, that could be a problem.
B: No 10Mbit upload option - for now you are stuck with the 2Mbit upload variant. Though they do have plans to provide the 10Mbit option in future, along with the 20Mbit option when it is released.
C: No IPv6 yet - again they have plans to provide it in future, it's in the trial stages, but it's not that important for me - but may be a problem for others.
you almost had me sold, until the 2mbit upload part. shame on that.
Do plusnet still have capacity issues so even with pro its full speed during peak?