THE TROOPER wrote in post #8137214
Can't speak for the 16-35 but i have 24-70 on 5DII and its great for walkabout and landscape.
You just ain't got an UWA then. I think 24 may not be enough if you want low down auto shots.
Ian
do explain UWA, thanks.
bohdank wrote in post #8137566
Go through all your previous inages and delete all the ones shot between 17-23mm. Those you would never have been able to take.
PS. Delete, figuratively

I would have added another lens and not have sold the 17-40, unless it was to replace it with the 16-35.
after "figuratively deleting" shots between 17-23mm, i found that there weren't too many. and the few, i could get shooting it at 24mm. great advice!
The Moose wrote in post #8137627
Think of it this way. You had the 17-40. That's closer to the 16-35 in FL than the 24-70. Did you like having that limitation or were you looking for more zoom? You've obviously had a taste of the UWA zoom so if you enjoyed it then it's probably best to go for the 16-35.
i'd prefer a bit of a zoom, yes. i'm still at a loss on UWA, sorry. what are the differences with having it and not in the 24-70?
eelnoraa wrote in post #8139115
This is very good advice. do you find FL of 17-40 limiting you? If you find you want to go over 40mm a lot of times, then 24-70L is worth a look.
One negative aspect about the 24-70L is its weight and size. On paper, it is not too much more than 17-40L or 16-35II, but in pratice, it feels much larger and heavier. In my case, its size and weight keeps me from using it more often. so it may be one thing to consider
i hand hold the 70-200 2.8, so weight is not a problem. 
philthejuggler wrote in post #8139925
The 16-35 is a really lovely lens - I find it great on my 5D & 50D. The 24-70 is also a cracker - feels huge (but that isn't an issue personally). 24 is fairly wide on FF, but doesn't give that UWA look like the 16-20mm area does.
UWA? 