I have a nice, sharp 28-70 2.8L that rarely gets used wide open. When I am shooting indoor sports I am using either a prime or a 70-200 2.8 IS so I don't really need the short 2.8 zoom. Most of my close up shooting has become portraits at F8 or so. I am also finding that the 28-70 is either not quite wide enough on the short end or not quite enough reach on the long end. I am thinking about trading it for a 24-105 F4. I am not sure I would miss that much since I am stopping down the 28-70 anyway.
Thoughts from someone who has done this or who has both lenses?
I've done something similar, for very similar reasons. I sold my 24-70/2.8L and kept my 24-105/4L IS. I used the 24-70L so infrequently that I figured it was worth more to me as cash, than as a lens sitting on my shelf.
I'm doing the same thing--just bought a 24-105 refurb from Canon during their recent sale and like it so much that I've decided that I don't have much use for my heavier 24-70 2.8. Won't miss it much, as it sat in my bag most of the time. Will be selling it shortly.