Need help finding a good back pack!

Hey guys!

I bought a MacBook Pro 15" base model (non-retina) and I'm searching for a good bag pack. I'll need to take the MacBook with me for at least 3 years almost every weekday. I'll be going to university by train and subway every day. I need a very durable bag that'll fit AND protect my MacBook. I already have the Tucano Elements sleeve and would like to be able to keep that on my laptop (so laptop -> sleeve -> bag pack). Of course it has to look good too and there has to be room for some books and other stuff!

Hope you guys can help me out
Thanks!

 

Thanks for the suggestions! Is anyone familiar with the Timbuk2 bags?