I have the Lowepro Classified 200 and the smaller 160, it just fits a DSLR with a battery grip and 70-200 attached. Both are very good bags, but they both get heavy, specially with the load that you are considering. In actual shooting conditions, I find they do get a little uncomfortable and I usually end up having to put them down and hopefully have someone else watch them.


I have tried on the ThinkTank versions and they are very good, but they have the same footprint and weight as the Classifieds.


My best bag is the Tamrac 5788 Evolution backpack. This carries all lenses you specified, plus another one, plus a flash. It has room for filters, cleaning supplies and food or a jacket up top. But, the very best thing about this bag is you don