secure backpacks

[square_nothing]

any of you guys have this backpack ''Mobile Edge SecurePack'' proberly cant link it so i wont, but it is easy to find with a quick serch.
the zip to open the backpack is on the other side faceing your back so the only way to get stuf out if to take the backpack off.
looks like a really good idea, it has a section to hold your laptop and i think it has a hard plastic backing to lower the chance of damige if you do drop it.

is there any other similar products? want a backpack i can walk around town with my laptop and not constantly be checking if some one has nicked anything, especialy on cramped trains.
would be nice to have a similar product but with a little more space for books as i will be able to use it at uni aswell as general traveling.

 

[Downsy]

I've got a crumpler rucksac with the zip on the inside, worth a look.

 

[square_nothing]

I've got a crumpler rucksac with the zip on the inside, worth a look.

looking at the crumpler backpacks and cant se one that opens from the back
could you give me the name of the backpack please? or a link if it dosent count as a competior?
would be really apreiacted, cant find anybackpacks that open like this in england! the one i found only is soled in the usa...

thanks.