Don't know about the IS version, but I just got a 24-70L, and it was an upgrade from 18-55IS, and I don't miss the IS at all, the 24-70L really is fantastic, having the wide constant aperture makes up for the lack of IS, and overall the pictures it takes are at another level. I had second thoughts before I bought the lens because of the new version, but I don't regret it at all now.





-Todd