Backpack for DSLR and notebook

Went to Funan yesterday to look for a bag to carry my Pentax K100D DSLR plus other lens, and my HP DM1 notebook.

Why a backpack and not a messenger bag, like the one that I'm currently using?

1. Weight - a DSLR + notebook adds up to a considerable weight, which would be heavy to carry on 1 shoulder
2. Strap interference - on the same day, I purchased a Blackrapid strap which is worn across the body. Using a messenger bag would interfere with the usage of the strap

I tried out a few bags at Challenger and SLR Revolution.

1. Kata 3N1-22
2. Vanguard Up-rise 46
3. Lowepro Compuday 250

The Kata's notebook slot was a bit too narrow for the DM1. So it was instantly out. Nice design though, but expensive. The bigger version, the 3N1-33 looks a little too boxy.

The Vanguard was nice, but I didn't really like it's fancy-looking V-shaped clips. It looked a little large and heavy also. Maybe I was a little biased, but I thought a China brand would be cheaper.

The Lowepro was light, but it's straps look a little too lightly padded, and the side-access slot for the DSLR did not come with additional dividers for additional lens. Cheapest of the 3 though at $95. Ugly though...

While I was at Challenger, I also tried the Vanguard Sydney 27 messenger bag. Nice design (not black), with a removable DSLR insert. Pity that it was a little small.

Back home, I spotted new versions of the Kata 3N1 bag online. The 3N1-25 looks good, and sized between the 22 & 33 models. Likely to be expensive though.

Most likely I will get the Lowepro Compuday 250. A pity that I missed the previous promotion where it was selling at $77...