I honestly cannot agree with the recommendation that the OP keeps the 24-70mm lens. He's a photography student. He still has to learn and define his version of the art. If he uses the 24-70mm, then IMHO, his photographs will look like everybody else's photographs and he won't develop a style of his own that's marketable in a very competitive business. (Over here in South Africa, every idiot with a "Rebel" and Sigma budget zoom considers herself a "pro" photographer ... heck, scratch "pro" ... considers herself a photographer.)I get what you're saying, but defining your own version of an art doesn't require being focal length limited and/or having inferior lenses. What's wrong with owning the ultimate, and not getting rid of it?