try amazon, they are cheaper...
I'm 6'2", 230 and have been wearing them 8 months now... tread is real good.. got some S.O.L.E. insoles for them too
Amazon.com: SOLE Dean Karnazes Signature Series Insoles, Mens 10 /Womens 12: Shoes
another driver I work with has had them 2 years... he's a bit smaller, maybe 150.
I used to have knee pain, I'm totally sold and would recommend!!
the last 10 years I had been wearing Red wings, which were good support, but these Ecco's are badass(2 pair).. plus it's a tax write off