I am using the Lowepro Pro Roller Lite 250 AW and its perfect. I filled up with a D4 with a 50 mm attached, 1x D700 with 80-200 attached, 1x D700 body, 24-70 lens only, 24 mm lens only, 105 macro lens only, and a Canon D6 body and the 50 mm 1,2 inclusive diverse accus.
As for shooting i am using the Sunsniper TPH Harness.
For offroad traveling i am using the back pack Lowepro Vertex 200 AW
With all the packs you have a laptop case inclusive and i transport both macbooks:-)
I am fully happy with all and no trouble so far. The backpack has traveld already 7 years with me around 8 times every year to China and India and 14 days along the great wall started in Quinhuangdao:-)
That is the best you can buy