hey guys i need some help. as mentioned abouve, im looking for a backpack that can carry a 7d with a canon 10-22 mounted and 400d with a 70-200 isII mounted on it plus a 13 or 15 inch laptop. itd be great if it could also carry a raincoat/shirt, a water bottle, flash an extra small prime and various camera related gear (i.e. cables, chargers, memory cards etc.) quick access isnt an issue and i really dont want a roller.