Sorry that the information overload confused you. As you can tell, we are all passionate about the cookers that we use (and in some cases, cookers that we haven't used but maybe read about
Given you choices of WSM or Akorn, and your desire for grilling and high temp searing, the Akorn is a much better choice. The Kamado design is great for grilling and baking, and can do a nice job at smoking if needed.
Good luck and let us know what you decide!