I am on the hunt for a sling bag with the capability to carry the following:

D800E + Battery Grip + 24-70mm lens
70-200mm lens
SB-800 Flash
7-in tablet
Pocket for batteries, memory cards, and other sundry items.

I have a Lowepro backpack that can carry the stuff but it is rather cumbersome to deploy the camera from it. I would also prefer not spending a mint on it either, but I am willing to pay for a quality product.