Hi!
Ive been through a few bags, from crap, to nice leather, and for me, I found my greatest bag. Im not sure about your gear, how much, lenses bodies etc? I looked at a bunch of bags, and finally bought the Quantaray U100 Pro Backpack. I looked at more expensive, yet same size bags, and this one is perfect, its not too insanely jumbled with pockets etc like others, the size is perfect, it has a padded laptop area, the main compartment is removeable and waterproof to boot. The walls are customizable, which I love, and comfortable right now is holding the following with room for more:
Nikon D70 Body with Battery Grip, (Quite large!)
Nikon 18-70mm DX Lens
Nikon 70-210mm AF Nikkor Zoom
Nikon N80 Body with Battery Grip
Canon Canonet Glll QL17 with 48-49mm Step Up Ring plus Filter and Lens Hood, all attached!
Lomo HOLGA Medium Format Plastic Cam, very fun by the way
Nikon Battery Charger
USB Cables, Memory Cards, 6 Rolls of Boxed Film, Lens Hood for 18-70mm Lens, Extra Batteries, Cleaning Kit, extra screws
MacBook and wall adaptor
List looks long, but thats standard stuff, plus it has an outside mesh pocket on each side, and a side tripod holder, that my Manfrotto full size tripod fits fine in. I use this every day, the shoulder straps are extremely comfortable! Dont overlook that part or youll pay for it in shoulder and back pain! Thats really all I can say, theres even room set aside with all that in it for my Bessa R thats on the way!
Hope it helped a little!
Bryan
Heres the link so you can check it out, great price too! Mine still looks new! Zero problems, and its been through some ROUGH times!
http://www.ritzcamera.com/product/4...ries;cibags-cases-straps;cibackpacks-daypacks
PS- Only concern with a sling pack, if you get some weight in it, they weigh down and get akward to wear, just something to consider.
Let me know if you need a photo or anything.