I was going to say the same thing as Trevor...I have an 18-70 and a 75-300, and it's perfect. My next lens will definitely be the 50 f/1.8. In the future, I might replace the 75-300 with a 70-200 f/2.8. I think the 28-300s are only for people who have to travel extremely light, and can't bring along extra lenses.