hi guys...i already have a lowepro slingshot a100 for my D40 + Sigma 18-200 + filters and some little barang barang, but sometimes i find the need to bring along my 12" laptop as well for projects or on site editing. In such a situation i put my D40 in a soft pouch and stuff it into my laptop bag. Thing is its just not comfortable, the bag becomes really fat and bulky not the mention the load being concentrated on one shoulder. I am looking for a backpack which can put my 12" lappy + power adapter comfortably and the d40+ 18-200mm lens and some filters. Budget about $150/-. Any recommendations from you guys?