I've got the Lowepro Slingshot 300AW, and here's what I can get in that bag with some space to spare for small stuff.
Cameras: Canon 1d MKII with the 70-200mm f/2.8 attached, and Canon A2 with 28 - 105 attached
Other lenses: 16 - 35mm f/2.8; 24 - 70mm f/2.8
Flashes: 550 EX, and 430EZ (I was using my 580EX and my G7 to shoot the bag.
CP-E3 battery pack, spare batteries, Flip-it, spare 1D battery, etc.





