I was in a similar situation wanting a smaller bag that would take my a77, CZ 16-80mm, and Sony 70-400mm. I have a small Tamrac and a large Kata, 3N1-30. In addition to being large, I really do not like the way the Kata is configured with a separate compartment on top for accessories. I constrains access to the equipment compartment were the two compartments meet. I also wanted the bag to accept a tripod. I looked a number of different bags at several stores. What I found that suited my purposes was a Thinktank Street Walker. It comes with a cover, has a place for a tripod, and has more than enough room to meet my travel needs.