I think fstopgear backpacks are great as they've designed them similar to hiking and outdoor packs, ie you can actually carry them with weight in them without breaking your back.
I just received my Satori EXP backpack which is their largest bag, and it seems to be just great, with one exception -- this largest bag is still rather small.
I have their largest ICU, which takes my Linhof Techno, sliding back and six lenses and some filter stuff, but then there's not much space left for clothes and food for longer day trips in the wild. I also plan to get 1 or 2 more lenses and then the largest ICU will be a bit too small.
So does someone have a tip for a bag that's larger than fstop gear's Satori, but otherwise designed in a similar way?