Backpack for a 15.4" notebook?

Hi,
I have a normal backpack, not for notebook. I vever had or saw a backpack for notebook by myself, I do not know if thy have got revestment above, so that when you put it on the flor there is no shock for the notebook. Because my normal backpack it was great for a 14" notebook and should be able to keep a 15.4 too, but it has got no protection above, so I had all the time to put something above the notebook to avoid risks.
Do you know if backpacks for notebook are different?
And can you give me a list of the three best choices for a 15.4"?
Thanks

 

I'd just get a good sleeve. that way you have versatility. I recommend the one I have from REI. The E-Wrap

 

I just got myself the Logitech Kinetik backpack. At first it seemed a bit big, but it really does feel very light when you put it on. I must say I've grown to like the little turtle on my back

 

Well, Logitech Kinetik is...let's call it high-end notebook backpack!
I don't like orange-black combination of colors, but besides that it's almost perfect
(whole black or black-grey combination will be best for me)!

But it cost about 100 USD! Sorry but for me it's too much for backpack!
For that money you can buy good backpack and good wireless mouse (Logitech V470 bluetooth, like I did).

For me reasonable choice would be something like TRUST 600B/BG-4500p.
I have tried TARGUS TEB01 and TARGUS CN600 before - they are as twice expensive as this one, but not better.

 

Mobile Edge Express?

I got it brand new for $23 on eBay shipped.