This is one of the better review sites out there.
Not just a review of a single item – they pick a category and then select items in that category and then narrow down until they find a winner. They explain the process and their finding along the way.
It is a US based site so all of the links tend to go to Amazon.com but there have only been a couple of times I have not found what I have been looking for on the amazon.co.uk site.
Some examples of categories would be: