I voted for the Cerf tote because I recently purchased the large version in black and took it on a trip to NYC with me last week. We had a late flight back home and had to check out of our room early, so I was forced to carry it with me for the entire day. The things I like about it are that it has so many pockets / compartments so you can keep things very organized (I'm really bad about just throwing things in my bags). Also, because it is a very subtle Chanel bag, I felt very comfortable carrying it with me everywhere (subways, shopping, US Open, etc..).
I also thought about the Grand Shopping Tote, but felt that I would get more use out of the Cerf...but IMO you can't go wrong with either!