Please help me pick a backpack (reqs inside)

Dear friends,
I was the happy owner of a Lowepro backpack (think it's the Fastpack 250 or 350) until I recently added a second body to my gear.

Is there a backpack that will fit all the following reqs ?

Store a 7D with 70-200 2.8 IS mounted and a 40D with a shorter lens (usually the 50mm 1.4 also mounted. Store another couple of lenses (a 100mm and a 10-22) and a 580EX.

Store a laptop

Fit within AIRLINES bag limits

Possibly have an all weather built in cover and a strap to secure a tripod

Of course other pockets for batteries and chargers, triggers, cleaning equipment, memory cards, cables etc.

Thank you very much
Bob

ThinkTank has a few that I believe would fit your criteria. I personally have the ThinkTank Airport Antidote 2.0, and it accommodates a similar sort of setup to what you have listed. It fits my 15" laptop with a bit of wiggle room, and is carry-on legal. It also comes with a weather cover, although not built directly into the bag like LowePro. I was searching for a while before finally picking this bag, and am VERY glad I did.

Looks cool ! Need to understand if I can find them here in Europe. Thanks
Bob