For the last 6 years or so I have been working on and off in a computer store, and one of the most common questions I would always get was along the lines of: "which is the best mouse/keyboard/headphone".
It seems there is a lot of questions and not many simple answers. I would also say its near impossible to a single person to know every specification on all the products that are out there.
My typical responses are along the lines of:
For me many of those are personal choices that can have a significant impact of which device I should get.
So the motivation for this site is purely education and to help people make informed choices.