I will. I go back and forth. On one hand the much lighter weight is really nice. On the other hand if I get a 600 how often would I go to the 400 instead. I'll definitely let you know if I do decide to sell.
I know the feeling. With my 7D being toast now I just lost my "600 and 300"
I live in the Reno/Tahoe area and drive to LA once a month for work.