i was wondering if the CR500AF is worth the $8000 price tag? i mean i love the stiffness of the aluminum frame on the 250 (not to mention it just flat out looks good). i have become very accustomed to the power of a 250 and someday i will probably want the 500. i know some of you guys have the AF's and what do you think of them? what do you like and what problems, if any, do you experience with them? thanks.