I'm after a case/bag for my MBP 13. Have a budget of around £30 or under (around $50). Must be tough as my MBP lives in the back of my car when I'm driving around. Must have a handle or a strap so I can carry it. Must have space for my charger. I looked at the Crumpler Hard Suit but after reading a few reviews on here, it doesn't sound as tough as they say it is. Any suggestions?