Good bag for a 17"widescreen notebook

I have a Dell Inspiron 9300 on order and I'll need a bag to cart it around in. I know the thing is the size of a surfboard so I'll need to get a big one - any recommendations?
I'm actually from the UK but I should be able to track down equivalents if you point out a US supplier.
I probably want something that doesn't look too 'Laptoppy' - don't want everyone to know what I am carrying, maybe a backpack type.

 

You ight start with looking at ebags, they have a nice assortment and hsould have a few backpacks in the 17" size.

 

If you don't have to carry around a bunch of other stuff, the Crumpler line ( www.crumplerbags.com) has the "Skivvy" which fits my Gateway 17" widescreen with roughly the same dimensions. It looks more like a messenger bag than some others, but won't hold books. I just took mine on a long driving trip with all the necessary power, ethernet, and phone cords, plus one jewel case, but that was about all I could take.

 

I think I am going to go with one of these http://www.techair.co.uk/store/productdetails.asp?ProductId=57 They have some better ones on their, but this one is a third of the cost and looks fairly good.

 

Here's what I recently ordered for my new Sager 5720: http://www.booqbags.com/Detail.bok?no=16

 

Sweet bag Jack!!! I'm also in need of a new bag - my laptop is 15.4 but it sticks out a little too far in the front so it doesn't fit in my current bag. Looks like I'll have to get a 16" or 17" bag.