Still looking for a large capacity lightweight backpack

Have you done any more reviews Brian?
I have the 12.1" Portableone UX (same as Asus Z33a) with the extended battery and am looking for a backpack with a laptop sleeve for a smaller unit that is lightweight but has a lot of room for books. I loved your review of the Sumdex but I need something that can hold several books. Any other suggestions?

A few people had suggested the Booq BP3 bag, but will the sleeve be too big for the smaller unit. If so, how much can fit in the bag? I was told it has a large capacity, but the 6" total depth made me wonder...anyone know, for example, with a laptop how many reams of paper would fit (since that's an objective comparison)?

 

You're not going to get a lightweight bag that has a lot of room. The Tom Bihn brain bag comes to mind though as a well done bag that has a lot of space. It's not heavy but is very espensive with accessories.

 

:-(...I was hoping for a different response. The Tom Bihn bag doesn't have a built in sleeve, does it (unless i am mistaken)? I really prefer the ease of a built in sleeve; also, their sleeves which I know can be somewhat attached are either a tad too small with the extended battery or too big. I was hoping for a better fitting option.