I've got the 350AW, and yes, all the inserts are moveable however you want. (If you're unsure, just go to a shop and try it out, then buy cheaper online anyway).
For comparison, in mine I get:
7D + 70-300L
Takumar 50/1.4 (size of the EF 50/1.8ii)
Lots of filters (58, 67, 72, 77mm CPL, 2x 72mm NDs, 4x 58mm special effects) all in boxes (would take up less room in a pouch)
Then sometimes I can also squeeze in a Zeiss Sonnar 180/2.8 (for 6x6 Medium Format, 86mm front thread, it's huge), or a Flektogon 50/4.0, or a gorillapod depending how i'm feeling.
15.4" laptop in the laptop part (charger fits too somewhere).
Spare batteries for the camera and flash, usb cable in case, extra CF card and microfibre cloths, charger if i'm going away for a while.
And strapped on the outside is my Vanguard Alta Pro 283CT (60cm or so long folded, maybe 70cm including ballhead).
I don't like putting it on my back with all that weight (if i've got the Sonnar and laptop the whole bag is 10-15kg), but it all fits...