Derek, I use a 350D and a 5D. I purchased the 24-105L while using my 350D and noticed an extreme improvement in image quality. I then purchased a 5D and I love the 24-105L combination with that as well. Since then I have had "L lense fever" and do not use EFS lens'. Since you are needing a great walk around lens for outdoor use, I would suggest the 24-105L.