emm, i totaly disagree with this topic. I mean, there is no such a thing, as 'best in class' because every class has few or many ways of playing. like... lets take a coercer... you can be best for groups, but not good in raid, you can be great with soloing stuff... best in douing, or other hybrid :-)
i doubt that there is someone who is great in every aspect of his/her class.. At least i have never met anyone who was that great.
