I've personally never been a fan of the 24-70. It's a fine workhorse lens, but it's never really felt like anything special. I shoot mostly with my 35L and Sigma 85 f/1.4. I've got a 70-200 f/2.8L, but I'm not particularly fond of it. I'd like to sell it off and get a 135L, but I shoot too many corporate events where I need that 200mm.
I actually just finally made the decision to upgrade to the 5DmkIII yesterday, but of course everyone is out of stock right now. Really hoping I can get it in time for a big job in a few weeks. How hard has it been adjusting to the new AF system? After 4 years of 'focus, recompose, focus, recompose, focus, recompose' I imagine it's gonna take a while.