My input is probably not usefull, I think most of my gear has been phased out for newer models.

I have a Lowpro 400 AW Trekker and a Tamrac 8x. I find little real difference between the two and would say both are ok and get the job done. If I were in the market to buy a new bag I wouldn't neccessarly look at those two manufactures because both bags are somewhat uncomfortable.

To fill the need you are talking about I have two sizes of the Tamrac Velocity. It is an over the shoulder bag. While it is not the most organized bag in the world it is fairly comfortable and easy to access. On the small bag I can carry a 70-200 with body mounted and stash two other lenses on each side. The 1D IV is fat in the bag but barely fits. I can not carry all my gear in the little bag, so I usually travel with a soft sided pelican and carry the secondary support gear in that bag.