I've recently purchased a karrimor panther 65 rucksack for my oncoming trip to the europe. This bag is considered as mid size, considering most people would go for the 100L pack for month long holidays.
This pack feels very durable and tough, and the outer fabric feels so rufty-tufty. Great bang for the buck.
I'll be going on a month long holiday soon, and hopes this karrimor wont fail on me.