+1 on the VanGoddy mentioned above. Mine is all black and travels superbly well. It has room for all I need to carry (cables, mouse, a file or two) while remaining compact enough to be comfortable. Very satisfied with it.
The one I linked directly is just a flap over case, the grid holds things in tightly. If you want a little more security check out some of their other products. I am not a huge backpack person but their slim bag is extremely useful.