I have the
Tamrac Adventure 9 backpack.
It fits all but one lens in the bottom section, plus my 17 inch laptop.
Leaving the top part of the bag to be filled with other random electronic gear.
Sure Tamrac isn't a trendy name like Thinktank or Crumpler, but for a decent price you can get an exceptional bag.
I upgraded from the Adventure 7 to the 9 series a couple years ago, as I needed more room.
Though the 9 isn't large enough to hold my shoes in the top compartment (I got big feet).