17" Powerbook bags?

[Benn]

What I'm actually looking for is a relatively inexpensive yet 
protective backpack for my 17" powerbook.  I'm going to be going on a 
long trip with a few stops and I need to have places to pack stuff.  
Anyone have experiences to share?

I'm also looking to sell my Marware Sportfolio Extreme:
http://www.marware.com/SFExtreme.html
Anyone interested can contact me off the list.

Thanks,
Benn