I have been tossing this topic around in my mind for some time now. Thanks to this thread, it led me to make the decision that the 17-40 will be my first L lens within the next few months-need to see year end financal numbers and tax responsibilities and what if anything is leftover! I figure that within 2-3 years I will bite the bullet and get a FF camera and some more lenses. Thanks to everyone's imput to the OP. It's helped me make my decision as well.