Summary: I bought the 150 when I had the DX camera (D300s) and all the DX lenses + Speedlight 600 and various filters and such.Since then, I have gone to the FX camera (D700) with the bigger, bulkier, FX Professional lenses, Speedlight 910, Remote Control/Intervelometer, Batteries, Charger, Filters et. al. The 200 model took it all and did it with room to spare for a couple more lenses. (Just don't tell my wife...LOL) ;-)Totally recommend for travelling around.
Summary: I received this bag today and my initial impression is that it is very impressive.The bag itself is huge inside and comfortably fits my 50d and 7d both gripped. There is even room for two of my studio umbrellea's. I can see this bag being part of my kit for years to come.There are one or two slight niggles with the bag though one is that when it is full and zipped up its really hard(tight) to put a 15.4" laptop in the front pouch.