I have 2 Webers, the typical old school round charcoal one and a Genesis gas grill. The charcoal one has never rusted but I've replaced some internals on the Genesis once because of rust. I think they're both like 5 years old!The Kamado Joe grills do look to compete favorably with the Big Green Egg. I have to say, the quality of the Big Green Egg components is outstanding. I've had mine for 5 or 6 years... could be 7.. no rust on the grill or other stainless steel supports, gadgets, etc. I've been quite impressed. I replaced several Weber parts over the years... and had several Webers as they would rust out when we lived in PA.
Then again the Genesis is like 1/4 of the Green Eggs price. I guess it's expected for the Green egg to be perfect for it's cost and it's apparent that you've had that longevity for what you paid. So I guess it's worth it in the long run!
I'm still not buying one though!