If the "Grey Man" concept is the point of the bag then I would strongly lean towards the posters suggestion above me.
If you like Camelbak the BFM would be a good choice. Organization is setup well for travel, especially if you have lot's of electronics chargers, small parts, etc. I would find another option besides 5.11 either way. The Rush is nearly the same as the BFM. The 3 main differences that sway me towards the CB are the neck piece above the straps rubs on my kneck, the workmanship is not on par with CB, CB's lifetime warranty is killer reminds me of kershaw,ZT,CRKt warranties.
I carried one about for about a year strait while couch surfing before I started college. I carried at all times comfortably a full size laptop (15.6 not sure if the pro is the 17) in the hydration compartment, a large shower kit in the main bag mesh upper compartment, an small first aid/BOK in the lower main mesh compartment, I carried clothes for about 4-5 days in the main compartment, I kept all of my cords in the lower out side pocket. In the organization compartment I kept a ridicules amount of stuff and in the two out side pockets I usually kept a water bottle and shaving kit. It weighed out around the 40 ish mark generally. After living out of that bag I will always recommend it. I bought it second hand from a photographer that had spent the previous two years going up and down africa... I sold it about a year ago in perfect shape when I swapped over to futura only harnesses.
If you think you might want a good suspension as well the Trizip is a nice option with the MR Futura suspension... Bit pricey but shop around I bought my 6500 for 450 by piecing it and my Linch for 90 secondhand with tags.
(I am biased to CB and MR... I currently use a MR NICE 6500 and a CB Linchpin)