I am going to Italy in January and will be in Rome, Florence, and Venice. So my question is this, I have a 60d and the kit 18-135, which is plenty long I think but I don't think it will be wide enough or fast enough for inside and cloudy Italy in January. I was wondering if anyone had any opinion if taking just a 15-85 would be wide enough for me so I could just take one lens. Or should I go with a 11-16 2.8 (figure the 2.8 is better for the weather and indoors that I am planing on than the more flare resistant cannon 10-22), and my 18-135. I would like to just take the one lens (15-85) but just not sure if it would be fast enough or wide enough for getting the good shots inside, and if it is really overcast. Any advice would be welcomed.