I get a lot of questions about zoom lenses. Especially the 18-135 since I have a video on that lens. I think a 70-200 is the way to go and there are a few options. I don not own a 70-200 because my 24-105 has filled my needs. A little about image stabilization also. Spend a little more now and get a lens you will use for a long time. The resale value of good lenses is also better.