I agree. Besides, I think it's all rider preference and experiences. On my 250 smoker, the 756 seemed to work well. I ran the 771 or 742 on the front and they seemed to work.
Haven't had antyhing, but Pirelli's and the Michelin I have now on the 450. The Pirelli's chucked knobbies quick. The Michelin seems to be doing OK so far. It's more of a mud tire though so works better in the spring and fall (more so the spring..last fall was not typical).
I've thought about trying the Kenda's, etc., but for now, I do not seem to be putting alot into my tire selection other than price. I looked for a comparable front as well as I need one of those more than the back, but nothing near this deal. Oh well, I can always sell it to my brother.