If you haven't already guessed , the two lenses are Canons 24-70 and 24-105. I know both the pros and cons to each one but just making that final decision... its tough. 70 is sharper, and f2.8 but heavier and more expensive. 105 has a longer reach, IS, but not as sharp and only f4.
For me, I can only afford one lens, and will most likely not upgrade for a while. Ideally I would get the 24-70 and then 70-200, as I know this is one of the most elite setups you can get, but unfortunately the 70-200 wont happen, at least not for a while.
Currently I own a 7D with a tamaron 18-200 which is what im selling to replace. An 85 1.8 and sadly my 50 1.8 just broke. I shoot mainly video but take a lot of photos too when I travel and with friends.
So really its a question of is the f2.8 and apparent better sharpness of the 24-70 that much better to sacrifice the extra length and ease of the 24-105 for a walkaround lens?
I hope that all made sense