Looking for Backpack camera bag

[fabphoto]

Hi

I am looking for a Backpack camera bag for body + 18-55mm + 90-300mm + 50 mm + flash

I am mainly doing indoor photography so not too worried about the elements.

Max budget £100

Any recommendations?
Thanks

 

[stumac]

I think the lowepro transit range are great

 

[silverman]

I have a Crumpler backpack and it is a great bag.
Got myself one on the bay and then got one for my brother which was about £5 for a bag that looked brand new!