I was in a similar situation as you where I had the 15-85 and I loved it as a walk around lens. I sold the 15-85 after seeing images from the 18-135 STM and went with that as I hope to shoot more video too.
Some more input here....
Quick question:
Given the lenses that I currently have, should I get:
1) 70D Body only
2) 70D Kit I - 18-55 STM
3) 70D Kit II - 18-135 STM
I will be selling off the 60D to a friend who has been bugging me for it, along with its kit 18-55 IS II.



