Two Battery Nikon

Two Battery Nikon
Does anyone know a good Camera Bag to buy?

I need a big camera bag. is necessary to hold two SLR. a Nikon Nikon D40 and D80, three lenses and a flash and a few filters and spare batteries .. any suggestions??

For backpack or roller? waterproof backpack Lowepro Backpack DryZone 200 – Thinktank Airport Antidote, Tamrac Model 767 Photo Trail Backpack backpack (camera + laptop) – Lowepro CompuTrekker, Case Logic SLR and Computer Backpack roller style suitcase – Lowepro Pro Roller 1 Lowepro Nova Bag-4, Tamrac 5612 Pro 12

Nikon EN-EL9 aftermarket battery D40 D40x D60